数学增长率公式A=a（1+X）中的字母各指什么 答得好的给分 七年级下册习题数学
\u589e\u957f\u7387\u95ee\u9898a\uff081\u52a0\u51cfx\uff09b\u5f53\u4e2d 1\u662f\u6307\u4ec0\u4e48\u6c42\u8be6\u7ec6\u89e3\u7b541\u6307\u7684\u662fa\uff0c\u628aa\u770b\u6210\u5355\u4f4d1\u3002
2x+y-z=2
x+2y-z=5
x-y+2z=-7
2x+y-z=2---\u2460 x+2y-z=5---\u2461 x-y+2z=-7---\u2462
\u2460-\u2461:x-y=-3---\u2463
\u2461-\u2462:x+y=1---\u2464
\u89e3\u2463\u2464\u5f97:x=-1,y=2
\u518d\u5e26\u5165\u539f\u65b9\u7a0b\u7ec4\u4e2d\u7684\u4efb\u4e00\u65b9\u7a0b,\u89e3\u5f97z=-2
1.\u6c7d\u8f66\u5728\u5e73\u8def\u4e0a\u6bcf\u5c0f\u65f6\u884c30\u516c\u91cc\uff0c\u4e0a\u5761\u65f6\u6bcf\u5c0f\u65f6\u884c28\u516c\u91cc\uff0c\u4e0b\u5761\u65f6\u6bcf\u5c0f\u65f6\u884c35\u516c\u91cc\uff0c\u73b0\u5728\u884c\u9a76142\u516c\u91cc\u7684\u8def\u7a0b\u7528\u53bb4\u5c0f\u65f6\u4e09\u5341\u5206\u949f\uff0c\u56de\u6765\u4f7f\u75284\u5c0f\u65f642\u5206\u949f\uff0c\u95ee\u8fd9\u6bb5\u5e73\u8def\u6709\u591a\u5c11\u516c\u91cc\uff1f\u53bb\u65f6\u4e0a\u4e0b\u5761\u8def\u5404\u6709\u591a\u5c11\u516c\u91cc\uff1f
\u89e3\uff1a
\u53bb\u65f6\u4e0a\u5761x\u5e73\u8defy\u4e0b\u5761z
x+y+z=142 x/28+y/30+z/35=4.5 z/28+y/30+x/35=4.7
\u7b54\u6848\uff1ax=42 y=30 z=70
2.\u67d0\u6821\u521d\u4e2d\u4e09\u4e2a\u5e74\u7ea7\u4e00\u5171\u6709651\u4eba\uff0c\u521d\u4e8c\u7684\u5b66\u751f\u6570\u6bd4\u521d\u4e09\u5b66\u751f\u6570\u591a10%\uff0c\u521d\u4e00\u7684\u5b66\u751f\u6570\u6bd4\u521d\u4e8c\u7684\u5b66\u751f\u6570\u591a5%\u3002\u6c42\u4e09\u4e2a\u5e74\u7ea7\u5404\u6709\u591a\u5c11\u4eba\uff1f
\u89e3\uff1a
\u521d\u4e00\uff1ax \u521d\u4e8c\uff1ay \u521d\u4e09\uff1az
x+y+z=651 y=1.1z x=1.05y
\u7b54\u6848\uff1ax=231 y=220 z=200
3.x+y=10
2x-3y+2z=5
x+2y-z=3
\u89e3\uff1a
x+y=10 ----\uff081\uff09
2x-3y+2z=5 ----\uff082\uff09
x+2y-z=3----\uff083\uff09
\uff083\uff09*2+\uff082\uff09\u5f97
4x+y=11----\uff084\uff09
\uff084\uff09-\uff081\uff09\u5f97
3x=1
x=1/3
\u5c06x=1/3\u4ee3\u5165\uff081\uff09\uff0c\u89e3\u5f97
y=29/3
\u5c06x=1/3\uff0cy=29/3\u4ee3\u5165\uff083\uff09\u89e3\u5f97
z=50/3
4.\u67d0\u6821\u521d\u4e2d\u4e09\u4e2a\u5e74\u7ea7\u5171\u6709651\u4eba\uff0c\u521d\u4e8c\u7684\u5b66\u751f\u6570\u6bd4\u521d\u4e09\u7684\u5b66\u751f\u6570\u591a10%\uff0c\u521d\u4e00\u7684\u5b66\u751f\u6570\u6bd4\u521d\u4e8c\u7684\u5b66\u751f\u6570\u591a5%\uff0c\u6c42\u8fd9\u4e09\u4e2a\u5e74\u7ea7\u5404\u6709\u591a\u5c11\u4eba\uff1f
\u89e3\uff1a
\u89e3\u8bbe\u521d1 2 3\u4eba\u6570\u5206\u522b\u4e3aX Y Z
X+Y+Z=651
Y=110%Z
X=105%Y
\uff08\u89e3\u7684\u8fc7\u7a0b\u4e2d\u4e00\u5b9a\u8981\u6362\u6210Z\u6765\u8fd0\u7b97\uff09
231/200 Z + 220/200 Z +200/200 Z=651
Z=200 Y=220 X=231
5.\u5728\u4ee3\u6570\u5f0fax\u7684\u5e73\u65b9+bx+c\u91cc,\u5f53x=1,2,-3\u65f6\u4ee3\u6570\u5f0f\u7684\u503c\u5206\u522b\u662f0\uff0c3\uff0c28\uff0c\u5219\u8fd9\u4e2a\u4ee3\u6570\u5f0f\u662f\uff1f
\u89e3\uff1a
\u6839\u636e\u9898\u610f\u5f97\u5230\u65b9\u7a0b\u7ec4\uff1a
a+b+c=0 \u65b9\u7a0b1
4a+2b+c=3 \u65b9\u7a0b2
9a-3b+c=28 \u65b9\u7a0b3
\u65b9\u7a0b2-\u65b9\u7a0b1,\u5f97:
3a+b=3
\u65b9\u7a0b3-\u65b9\u7a0b1,\u5f97:
5a-5b=25,\u5373:a-b=5
\u5f97\u5230\u65b0\u65b9\u7a0b\u7ec4\uff1a
3a+b=3
a-b=5
\u89e3\u65b9\u7a0b\u7ec4\u5f97:
a=2
b=-3
\u628aa=2,b=-3\u4ee3\u5165\u539f\u65b9\u7a0b\u5f97\uff1ac=1
\u6240\u4ee5\u539f\u65b9\u7a0b\u7ec4\u89e3\u4e3a\uff1aa=2,b=-3,c=1
6\u3002\u5728\u7b49\u5f0fy=a*x\u7684\u5e73\u65b9+bx+c\u4e2d\uff0c\u5f53x=1\u65f6,y=-2;\u5f53x=-1\u65f6\uff0cy=20;\u5f53x=3/2\u4e0ex=1/3\u65f6\uff0cy\u7684\u503c\u76f8\u7b49\uff0c\u6c42a,b,c\u7684\u503c
\u89e3\uff1a\u5f53x=1\u65f6,y=-2;\u5f53x=-1\u65f6\uff0cy=20\u5206\u522b\u5217\u51fa\u65b9\u7a0b1.2
a+b+c=-2 .............1
a-b+c=20 .............2
a+b=0 .............3
\u6240\u4ee5b=-11 a=11 c=-2
7.36\u5757\u7816\uff0c36\u4eba\u642c\uff0c\u7537\u642c4\u5973\u642c3\uff0c\u4e24\u4e2a\u5c0f\u5b69\u642c\u4e00\u5757\u3002\u95ee\u7537\u4eba\uff0c\u5973\u4eba\uff0c\u5c0f\u5b69\u5404\u591a\u5c11\u4eba\uff1f
\u89e3\uff1a
\u8bbe\u7537\u7684\u6709a\u4eba\uff0c\u5973\u7684\u6709b\u4eba\uff0c\u5c0f\u5b69\u6709c\u4eba\uff0c\u4f9d\u9898\u610f\uff0c\u5217\u65b9\u7a0b\u7ec4\u5f97
4a+3b+0.5c=36\uff0c
a+b+c=36.
\u6c42\u8fd9\u4e2a\u65b9\u7a0b\u7684\u6574\u6570\u89e3\uff0c
\u6d88\u53bbc,\u5f977a+5b=36,
7a\u53ea\u80fd\u53d67\uff0c14\uff0c21\uff0c28\uff0c
5b\u53ea\u80fd\u53d65\uff0c10\uff0c15\uff0c20\uff0c25\uff0c
\u8fd9\u4e9b\u6570\u4e2d\uff0c\u53ea\u670921+15\uff1d36\uff0c\u6ca1\u6709\u5176\u5b83\u7684\u60c5\u51b5\u4e86\uff0c
\u6b64\u65f6a=3\uff0cb=3\uff0cc=30.
\u5373\u75373\u4eba\uff0c\u59733\u4eba\uff0c\u5c0f\u5b6930\u4eba.
8.\u4e00\u4e2a\u4e09\u4f4d\u6570\uff0c\u4e2a\u4f4d\u3001\u767e\u4f4d\u4e0a\u7684\u6570\u5b57\u7684\u548c\u7b49\u4e8e\u5341\u4f4d\u4e0a\u7684\u6570\u5b57\uff0c\u767e\u4f4d\u4e0a\u7684\u6570\u5b57\u76847\u500d\u6bd4\u4e2a\u4f4d\u3001\u5341\u4f4d\u7684\u6570\u5b57\u59272\uff0c\u4e2a\u4f4d\u5341\u4f4d\u767e\u4f4d\u4e0a\u6570\u5b57\u7684\u548c\u662f14\uff0c\u6c42\u8fd9\u4e2a\u4e09\u4f4d\u6570
\u89e3\uff1a
\u8bbe\u4e2a\u4f4d\u6570\u5b57 \uff1d x\uff0c\u5341\u4f4d\u6570\u5b57 \uff1d y\uff0c\u767e\u4f4d\u6570\u5b57 \uff1d z
\u6709\uff1ax + z \uff1d y\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\uff081\uff09
7z \uff1d x + y + 2\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\uff082\uff09
x + y + z \uff1d14\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\uff083\uff09
\u89e3\u8fd9\u4e2a\u65b9\u7a0b\u7ec4\uff0c\u8003\u5bdf\uff082\uff09\uff0c\u6709\uff1a
x + y \uff1d 7z - 2
\u4ee3\u5165\uff083\uff09\uff0c\u6709
8z \uff1d 16
\u6240\u4ee5\uff1az \uff1d 2
\u4f9d\u6b21\u89e3\u5f97\uff1ay \uff1d 7 \uff0c x \uff1d 5
\u8fd9\u4e2a\u4e09\u4f4d\u6570\uff1d 275
9.\u8bbey+z/x=x+y/z=x+z/y=k,\u6c42k?
\u89e3\uff1a
Y+Z=XK
X+Y=ZK
Z+X=YK
2(X+Y+Z)=K(X+Y+Z)
K=2
10.\u7528\u4e00\u767e\u5757\u94b1\u4e70\u4e00\u767e\u53ea\u9e21,\u516c\u9e215\u5757\u4e00\u53ea.\u6bcd\u9e21\u4e09\u5757\u4e00\u53ea.\u5c0f\u9e21\u4e00\u5757\u4e09\u53ea.\u95ee\u516c\u9e21.\u6bcd\u9e21.\u5c0f\u9e21\u5404\u591a\u5c11\u53ea?
\u89e3\uff1a\u89e3\uff1a\u8bbe\u516c\u9e21x\u53ea\uff0c\u6bcd\u9e21y\u53ea\uff0c\u5c0f\u9e21z\u53ea
\u5219\u4f9d\u9898\u610f\u53ef\u5f97
x+y+z=100
5x+3y+z/3=100
\u5316\u51cf\u540e\u5f97
7x+4y=100
\u89c2\u5bdf\u7b49\u5f0f\u53ef\u77e525-7x/4\u5fc5\u987b\u4e3a\u6574\u6570
\u53ef\u5f97x\u4e3a4\uff0c8\uff0c12
\u82e5x=4\uff0c\u5219y=18\uff0c\u5219z=78
\u82e5x=8\uff0c\u5219y=11\uff0c\u5219z=81
\u82e5x=12\uff0c\u5219y=4\uff0c\u5219z=84
\u6c7d\u8f66\u5728\u5e73\u8def\u4e0a\u6bcf\u5c0f\u65f6\u884c30\u516c\u91cc\uff0c\u4e0a\u5761\u65f6\u6bcf\u5c0f\u65f6\u884c28\u516c\u91cc\uff0c\u4e0b\u5761\u65f6\u6bcf\u5c0f\u65f6\u884c35\u516c\u91cc\uff0c\u73b0\u5728\u884c\u9a76142\u516c\u91cc\u7684\u8def\u7a0b\u7528\u53bb4\u5c0f\u65f6\u4e09\u5341\u5206\u949f\uff0c\u56de\u6765\u4f7f\u75284\u5c0f\u65f642\u5206\u949f\uff0c\u95ee\u8fd9\u6bb5\u5e73\u8def\u6709\u591a\u5c11\u516c\u91cc\uff1f\u53bb\u65f6\u4e0a\u4e0b\u5761\u8def\u5404\u6709\u591a\u5c11\u516c\u91cc\uff1f
\u89e3\uff1a
\u53bb\u65f6\u4e0a\u5761x\u5e73\u8defy\u4e0b\u5761z
x+y+z=142 x/28+y/30+z/35=4.5 z/28+y/30+x/35=4.7
\u7b54\u6848\uff1ax=42 y=30 z=70
2.\u67d0\u6821\u521d\u4e2d\u4e09\u4e2a\u5e74\u7ea7\u4e00\u5171\u6709651\u4eba\uff0c\u521d\u4e8c\u7684\u5b66\u751f\u6570\u6bd4\u521d\u4e09\u5b66\u751f\u6570\u591a10%\uff0c\u521d\u4e00\u7684\u5b66\u751f\u6570\u6bd4\u521d\u4e8c\u7684\u5b66\u751f\u6570\u591a5%\u3002\u6c42\u4e09\u4e2a\u5e74\u7ea7\u5404\u6709\u591a\u5c11\u4eba\uff1f
\u89e3\uff1a
\u521d\u4e00\uff1ax \u521d\u4e8c\uff1ay \u521d\u4e09\uff1az
x+y+z=651 y=1.1z x=1.05y
\u7b54\u6848\uff1ax=231 y=220 z=200
3.x+y=10
2x-3y+2z=5
x+2y-z=3
\u89e3\uff1a
x+y=10 ----\uff081\uff09
2x-3y+2z=5 ----\uff082\uff09
x+2y-z=3----\uff083\uff09
\uff083\uff09*2+\uff082\uff09\u5f97
4x+y=11----\uff084\uff09
\uff084\uff09-\uff081\uff09\u5f97
3x=1
x=1/3
\u5c06x=1/3\u4ee3\u5165\uff081\uff09\uff0c\u89e3\u5f97
y=29/3
\u5c06x=1/3\uff0cy=29/3\u4ee3\u5165\uff083\uff09\u89e3\u5f97
z=50/3
4.\u67d0\u6821\u521d\u4e2d\u4e09\u4e2a\u5e74\u7ea7\u5171\u6709651\u4eba\uff0c\u521d\u4e8c\u7684\u5b66\u751f\u6570\u6bd4\u521d\u4e09\u7684\u5b66\u751f\u6570\u591a10%\uff0c\u521d\u4e00\u7684\u5b66\u751f\u6570\u6bd4\u521d\u4e8c\u7684\u5b66\u751f\u6570\u591a5%\uff0c\u6c42\u8fd9\u4e09\u4e2a\u5e74\u7ea7\u5404\u6709\u591a\u5c11\u4eba\uff1f
\u89e3\uff1a
\u89e3\u8bbe\u521d1 2 3\u4eba\u6570\u5206\u522b\u4e3aX Y Z
X+Y+Z=651
Y=110%Z
X=105%Y
\uff08\u89e3\u7684\u8fc7\u7a0b\u4e2d\u4e00\u5b9a\u8981\u6362\u6210Z\u6765\u8fd0\u7b97\uff09
231/200 Z + 220/200 Z +200/200 Z=651
Z=200 Y=220 X=231
5.\u5728\u4ee3\u6570\u5f0fax\u7684\u5e73\u65b9+bx+c\u91cc,\u5f53x=1,2,-3\u65f6\u4ee3\u6570\u5f0f\u7684\u503c\u5206\u522b\u662f0\uff0c3\uff0c28\uff0c\u5219\u8fd9\u4e2a\u4ee3\u6570\u5f0f\u662f\uff1f
\u89e3\uff1a
\u6839\u636e\u9898\u610f\u5f97\u5230\u65b9\u7a0b\u7ec4\uff1a
a+b+c=0 \u65b9\u7a0b1
4a+2b+c=3 \u65b9\u7a0b2
9a-3b+c=28 \u65b9\u7a0b3
\u65b9\u7a0b2-\u65b9\u7a0b1,\u5f97:
3a+b=3
\u65b9\u7a0b3-\u65b9\u7a0b1,\u5f97:
5a-5b=25,\u5373:a-b=5
\u5f97\u5230\u65b0\u65b9\u7a0b\u7ec4\uff1a
3a+b=3
a-b=5
\u89e3\u65b9\u7a0b\u7ec4\u5f97:
a=2
b=-3
\u628aa=2,b=-3\u4ee3\u5165\u539f\u65b9\u7a0b\u5f97\uff1ac=1
\u6240\u4ee5\u539f\u65b9\u7a0b\u7ec4\u89e3\u4e3a\uff1aa=2,b=-3,c=1
6\u3002\u5728\u7b49\u5f0fy=a*x\u7684\u5e73\u65b9+bx+c\u4e2d\uff0c\u5f53x=1\u65f6,y=-2;\u5f53x=-1\u65f6\uff0cy=20;\u5f53x=3/2\u4e0ex=1/3\u65f6\uff0cy\u7684\u503c\u76f8\u7b49\uff0c\u6c42a,b,c\u7684\u503c
\u89e3\uff1a\u5f53x=1\u65f6,y=-2;\u5f53x=-1\u65f6\uff0cy=20\u5206\u522b\u5217\u51fa\u65b9\u7a0b1.2
a+b+c=-2 .............1
a-b+c=20 .............2
a+b=0 .............3
\u6240\u4ee5b=-11 a=11 c=-2
7.36\u5757\u7816\uff0c36\u4eba\u642c\uff0c\u7537\u642c4\u5973\u642c3\uff0c\u4e24\u4e2a\u5c0f\u5b69\u642c\u4e00\u5757\u3002\u95ee\u7537\u4eba\uff0c\u5973\u4eba\uff0c\u5c0f\u5b69\u5404\u591a\u5c11\u4eba\uff1f
\u89e3\uff1a
\u8bbe\u7537\u7684\u6709a\u4eba\uff0c\u5973\u7684\u6709b\u4eba\uff0c\u5c0f\u5b69\u6709c\u4eba\uff0c\u4f9d\u9898\u610f\uff0c\u5217\u65b9\u7a0b\u7ec4\u5f97
4a+3b+0.5c=36\uff0c
a+b+c=36.
\u6c42\u8fd9\u4e2a\u65b9\u7a0b\u7684\u6574\u6570\u89e3\uff0c
\u6d88\u53bbc,\u5f977a+5b=36,
7a\u53ea\u80fd\u53d67\uff0c14\uff0c21\uff0c28\uff0c
5b\u53ea\u80fd\u53d65\uff0c10\uff0c15\uff0c20\uff0c25\uff0c
\u8fd9\u4e9b\u6570\u4e2d\uff0c\u53ea\u670921+15\uff1d36\uff0c\u6ca1\u6709\u5176\u5b83\u7684\u60c5\u51b5\u4e86\uff0c
\u6b64\u65f6a=3\uff0cb=3\uff0cc=30.
\u5373\u75373\u4eba\uff0c\u59733\u4eba\uff0c\u5c0f\u5b6930\u4eba.
8.\u4e00\u4e2a\u4e09\u4f4d\u6570\uff0c\u4e2a\u4f4d\u3001\u767e\u4f4d\u4e0a\u7684\u6570\u5b57\u7684\u548c\u7b49\u4e8e\u5341\u4f4d\u4e0a\u7684\u6570\u5b57\uff0c\u767e\u4f4d\u4e0a\u7684\u6570\u5b57\u76847\u500d\u6bd4\u4e2a\u4f4d\u3001\u5341\u4f4d\u7684\u6570\u5b57\u59272\uff0c\u4e2a\u4f4d\u5341\u4f4d\u767e\u4f4d\u4e0a\u6570\u5b57\u7684\u548c\u662f14\uff0c\u6c42\u8fd9\u4e2a\u4e09\u4f4d\u6570
\u89e3\uff1a
\u8bbe\u4e2a\u4f4d\u6570\u5b57 \uff1d x\uff0c\u5341\u4f4d\u6570\u5b57 \uff1d y\uff0c\u767e\u4f4d\u6570\u5b57 \uff1d z
\u6709\uff1ax + z \uff1d y\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\uff081\uff09
7z \uff1d x + y + 2\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\uff082\uff09
x + y + z \uff1d14\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\uff083\uff09
\u89e3\u8fd9\u4e2a\u65b9\u7a0b\u7ec4\uff0c\u8003\u5bdf\uff082\uff09\uff0c\u6709\uff1a
x + y \uff1d 7z - 2
\u4ee3\u5165\uff083\uff09\uff0c\u6709
8z \uff1d 16
\u6240\u4ee5\uff1az \uff1d 2
\u4f9d\u6b21\u89e3\u5f97\uff1ay \uff1d 7 \uff0c x \uff1d 5
\u8fd9\u4e2a\u4e09\u4f4d\u6570\uff1d 275
9.\u8bbey+z/x=x+y/z=x+z/y=k,\u6c42k?
\u89e3\uff1a
Y+Z=XK
X+Y=ZK
Z+X=YK
2(X+Y+Z)=K(X+Y+Z)
K=2
10.\u7528\u4e00\u767e\u5757\u94b1\u4e70\u4e00\u767e\u53ea\u9e21,\u516c\u9e215\u5757\u4e00\u53ea.\u6bcd\u9e21\u4e09\u5757\u4e00\u53ea.\u5c0f\u9e21\u4e00\u5757\u4e09\u53ea.\u95ee\u516c\u9e21.\u6bcd\u9e21.\u5c0f\u9e21\u5404\u591a\u5c11\u53ea?
\u89e3\uff1a\u89e3\uff1a\u8bbe\u516c\u9e21x\u53ea\uff0c\u6bcd\u9e21y\u53ea\uff0c\u5c0f\u9e21z\u53ea
\u5219\u4f9d\u9898\u610f\u53ef\u5f97
x+y+z=100
5x+3y+z/3=100
\u5316\u51cf\u540e\u5f97
7x+4y=100
\u89c2\u5bdf\u7b49\u5f0f\u53ef\u77e525-7x/4\u5fc5\u987b\u4e3a\u6574\u6570
\u53ef\u5f97x\u4e3a4\uff0c8\uff0c12
\u82e5x=4\uff0c\u5219y=18\uff0c\u5219z=78
\u82e5x=8\uff0c\u5219y=11\uff0c\u5219z=81
\u82e5x=12\uff0c\u5219y=4\uff0c\u5219z=84
\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\u7ec4\u590d\u4e60\u7ec3\u4e60\u9898
\u4e00\u3001\u586b\u7a7a\u9898
1\u3001\u5173\u4e8eX\u7684\u65b9\u7a0b \uff0c\u5f53 __________\u65f6\uff0c\u662f\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\uff1b \u5f53 ___________\u65f6\uff0c\u5b83\u662f\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\u3002
2\u3001\u5df2\u77e5 \uff0c\u7528 \u8868\u793a \u7684\u5f0f\u5b50\u662f___________\uff1b\u7528 \u8868\u793a \u7684\u5f0f\u5b50\u662f___________\u3002\u5f53 \u65f6 ___________\uff1b\u5199\u51fa\u5b83\u76842\u7ec4\u6b63\u6574\u6570\u89e3______________\u3002
3\u3001\u82e5\u65b9\u7a0b 2x + y = \u662f\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\uff0c\u5219mn= \u3002
4\u3001\u5df2\u77e5 \u4e0e \u6709\u76f8\u540c\u7684\u89e3\uff0c\u5219 \uff1d __ \uff0c \uff1d \u3002
5\u3001\u5df2\u77e5 \uff0c\u90a3\u4e48 \u7684\u503c\u662f \u3002
6\u3001 \u5982\u679c \u90a3\u4e48 _______\u3002
7\u3001\u82e5\uff08x\u2014y\uff092+|5x\u20147y-2|=0\uff0c\u5219x=________\uff0cy=__________ \u3002
8\u3001\u5df2\u77e5y\uff1dkx\uff0bb\uff0c\u5982\u679cx\uff1d4\u65f6\uff0cy\uff1d15\uff1bx\uff1d7\u65f6\uff0cy\uff1d24\uff0c\u5219k\uff1d \uff1bb\uff1d \uff0e
9\u3001\u5df2\u77e5 \u662f\u65b9\u7a0b \u7684\u4e00\u4e2a\u89e3,\u5219 \u3002
10\u3001\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b4x+y=20 \u7684\u6b63\u6574\u6570\u89e3\u662f______________________\u3002
11\u3001\u4ece1\u5206\u30012\u5206\u30015\u5206\u7684\u786c\u5e01\u4e2d\u53d6\u51fa5\u5206\u94b1\uff0c\u5171\u540c__________\u79cd\u4e0d\u540c\u7684\u53d6\u6cd5\uff08\u4e0d\u8bba\u987a\u5e8f\uff09\u3002
12\u3001\u65b9\u7a0b\u7ec4 \u7684\u89e3\u662f_____________________\u3002
13\u3001\u5982\u679c\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\u7ec4 \u7684\u89e3\u662f \uff0c\u90a3\u4e48a+b=_________\u3002
14\u3001\u65b9\u7a0b\u7ec4 \u7684\u89e3\u662f
15\u3001\u5df2\u77e56x\uff0d3y=16\uff0c\u5e76\u4e145x\uff0b3y=6\uff0c\u52194x\uff0d3y\u7684\u503c\u4e3a \u3002
16\u3001\u82e5 \u662f\u5173\u4e8e \u3001 \u7684\u65b9\u7a0b \u7684\u4e00\u4e2a\u89e3\uff0c\u4e14 \uff0c\u5219 \uff1d \u3002
17\u3001\u5df2\u77e5\u7b49\u8170\u4e09\u89d2\u5f62\u4e00\u8170\u4e0a\u7684\u4e2d\u7ebf\u5c06\u5b83\u7684\u5468\u957f\u5206\u4e3a63\u548c36\u4e24\u90e8\u5206\uff0c\u5219\u5b83\u7684\u8170\u957f\u662f_________\u3002\u5e95\u8fb9\u957f\u4e3a___________\u3002
18\u3001\u5df2\u77e5\u70b9A(\uff0dy\uff0d15\uff0c\uff0d15\uff0d2x)\uff0c\u70b9B\uff083x\uff0c9y\uff09\u5173\u4e8e\u539f\u70b9\u5bf9\u79f0\uff0c\u5219x\u7684\u503c\u662f______\uff0cy\u7684\u503c\u662f_________\u3002
\u4e8c\u3001\u9009\u62e9\u9898\u3002
1\u3001\u5728\u65b9\u7a0b\u7ec4 \u3001 \u3001 \u3001 \u3001 \u3001 \u4e2d\uff0c\u662f\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\u7ec4\u7684\u6709\uff08 \uff09
A\u30012\u4e2a B\u30013\u4e2a C\u30014\u4e2a D\u30015\u4e2a
2\u3001\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\u7ec4 \u7684\u89e3\u662f\uff08 \uff09
A\uff0e B\uff0e C\uff0e D\uff0e
3\u3001\u4e09\u4e2a\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b2x+5y\u20146=0\uff0c3x\u20142y\u20149=0\uff0cy=kx\u20149\u6709\u516c\u5171\u89e3\u7684\u6761\u4ef6\u662fk=\uff08 \uff09
A\uff0e4 B\uff0e3 C\uff0e2 D\uff0e1
4\u3001\u5982\u56fe\uff0c8\u5757\u76f8\u540c\u7684\u5c0f\u957f\u65b9\u5f62\u5730\u7816\u62fc\u6210\u4e00\u4e2a\u957f\u65b9\u5f62\uff0c\u5176\u4e2d\u6bcf\u4e00\u4e2a\u5c0f\u957f\u65b9\u5f62\u7684\u9762\u79ef\u4e3a\uff08 \uff09
A. 400 cm2 B. 500 cm2 C. 600 cm2 D. 675 cm2
5\u3001\u4e00\u676f\u53ef\u4e50\u552e\u4ef71.8\u5143\uff0c\u5546\u5bb6\u4e3a\u4e86\u4fc3\u9500\uff0c\u987e\u5ba2\u6bcf\u4e70\u4e00\u676f\u53ef\u4e50\u83b7\u4e00\u5f20\u5956\u5238\uff0c\u6bcf\u4e09\u5f20\u5956\u5238\u53ef\u5151\u6362\u4e00\u676f\u53ef\u4e50\uff0c\u5219\u6bcf\u5f20\u5956\u5238\u76f8\u5f53\u4e8e( )
(A)0.6\u5143 (B)0.5\u5143 (C)0.45\u5143 (D)0.3\u5143
6\u3001\u5df2\u77e5 \u662f\u65b9\u7a0b\u7ec4 \u7684\u89e3\uff0c\u5219 \u3001 \u95f4\u7684\u5173\u7cfb\u662f\uff08 \uff09
A\u3001 B\u3001 C\u3001 D\u3001
7\u3001\u4e3a\u4fdd\u62a4\u751f\u6001\u73af\u5883\uff0c\u9655\u897f\u7701\u67d0\u53bf\u54cd\u5e94\u56fd\u5bb6\u201c\u9000\u8015\u8fd8\u6797\u201d\u53f7\u53ec\uff0c\u5c06\u67d0\u4e00\u90e8\u5206\u8015\u5730\u6539\u4e3a\u6797\u5730\uff0c\u6539\u53d8\u540e\uff0c\u6797\u5730\u9762\u79ef\u548c\u8015\u5730\u9762\u79ef\u5171\u6709180\u5e73\u65b9\u5343\u7c73\uff0c\u8015\u5730\u9762\u79ef\u662f\u6797\u5730\u9762\u79ef\u768425%\uff0c\u4e3a\u6c42\u6539\u53d8\u540e\u6797\u5730\u9762\u79ef\u548c\u8015\u5730\u9762\u79ef\u5404\u591a\u5c11\u5e73\u65b9\u5343\u7c73\u3002\u8bbe\u6539\u53d8\u540e\u8015\u5730\u9762\u79efx\u5e73\u65b9\u5343\u7c73\uff0c\u6797\u5730\u5730\u9762\u79efy\u5e73\u65b9\u5343\u7c73\uff0c\u6839\u636e\u9898\u610f\uff0c\u5217\u51fa\u5982\u4e0b\u56db\u4e2a\u65b9\u7a0b\u7ec4\uff0c\u5176\u4e2d\u6b63\u786e\u7684\u662f\uff08 \uff09
A B C D
8\u3001\u8bbeA\u3001B\u4e24\u9547\u76f8\u8ddd \u5343\u7c73\uff0c\u7532\u4eceA\u9547\u3001\u4e59\u4eceB\u9547\u540c\u65f6\u51fa\u53d1\uff0c\u76f8\u5411\u800c\u884c\uff0c\u7532\u3001\u4e59\u884c\u9a76\u7684\u901f\u5ea6\u5206\u522b\u4e3a \u5343\u7c73\uff0f\u5c0f\u65f6\u3001 \u5343\u7c73\uff0f\u5c0f\u65f6\uff0c\u2460\u51fa\u53d1\u540e30\u5206\u949f\u76f8\u9047\uff1b\u2461\u7532\u5230B\u9547\u540e\u7acb\u5373\u8fd4\u56de\uff0c\u8ffd\u4e0a\u4e59\u65f6\u53c8\u7ecf\u8fc7\u4e8630\u5206\u949f\uff1b\u2462\u5f53\u7532\u8ffd\u4e0a\u4e59\u65f6\u4ed6\u4fe9\u79bbA\u9547\u8fd8\u67094\u5343\u7c73\u3002\u6c42 \u3001 \u3001 \u3002\u6839\u636e\u9898\u610f\uff0c\u7531\u6761\u4ef6\u2462\uff0c\u6709\u56db\u4f4d\u540c\u5b66\u5404\u5f97\u5230\u7b2c3\u4e2a\u65b9\u7a0b\u5982\u4e0b\uff0c\u5176\u4e2d\u9519\u8bef\u7684\u4e00\u4e2a\u662f\uff08 \uff09
A\u3001 B\u3001 C\u3001 D\u3001
\u4e09\u3001\u89e3\u7b54\u9898\u3002
1\u3001\u5728y= \u4e2d,\u5f53 \u65f6y\u7684\u503c\u662f , \u65f6y\u7684\u503c\u662f , \u65f6y\u7684\u503c\u662f ,\u6c42 \u7684\u503c,\u5e76\u6c42 \u65f6y\u7684\u503c\u3002
2\u3001\u6709\u4e09\u628a\u697c\u68af\uff0c\u5206\u522b\u662f\u4e94\u6b65\u68af\u3001\u4e03\u6b65\u68af\u3001\u4e5d\u6b65\u68af\uff0c\u6bcf\u6500\u6cbf\u4e00\u6b65\u9636\u68af\u4e0a\u5347\u7684\u9ad8\u5ea6\u662f\u4e00\u81f4\u7684\u3002\u6bcf\u628a\u697c\u68af\u7684\u6276\u6746\u957f\uff08\u5373\u68af\u957f\uff09\u3001\u9876\u6863\u5bbd\u3001\u5e95\u6863\u5bbd\u5982\u56fe\u6240\u793a\uff0c\u5e76\u628a\u6a2a\u6863\u4e0e\u6276\u6746\u69ab\u5408\u5904\u79f0\u4f5c\u8054\u7ed3\u70b9\uff08\u5982\u70b9A\uff09\u3002
\uff081\uff09 \u901a\u8fc7\u8ba1\u7b97\uff0c\u8865\u5145\u586b\u5199\u4e0b\u8868\uff1a
\u697c\u68af
\u79cd\u7c7b \u4e24\u6276\u6746\u603b\u957f\uff08\u7c73\uff09 \u6a2a\u6863\u603b\u957f\uff08\u7c73\uff09 \u8054\u7ed3\u70b9\u6570\uff08\u4e2a\uff09
\u4e94\u6b65\u68af 4 2\uff0e0 10
\u4e03\u6b65\u68af
\u4e5d\u6b65\u68af
\uff082\uff09 \u4e00\u628a\u697c\u68af\u7684\u6210\u672c\u7531\u6750\u6599\u8d39\u548c\u52a0\u5de5\u8d39\u7ec4\u6210\uff0c\u5047\u5b9a\u52a0\u5de5\u8d39\u4ee5\u6bcf\u4e2a\u4e2a\u8054\u7ed3\u70b91\u5143\u8ba1\u7b97\uff0c\u800c\u6750\u6599\u8d39\u4e2d\u6276\u6746\u7684\u5355\u4ef7\u4e0e\u6a2a\u6863\u7684\u5355\u4ef7\u4e0d\u76f8\u7b49\uff08\u6750\u6599\u635f\u8017\u53ca\u5176\u5b83\u56e0\u7d20\u5ffd\u7565\u4e0d\u8ba1\uff09\u3002\u73b0\u5df2\u77e5\u4e00\u628a\u4e94\u6b65\u68af\u3001\u4e03\u6b65\u68af\u7684\u6210\u672c\u5206\u522b\u662f26\u5143\u300136\u5143\uff0c\u8bd5\u6c42\u51fa\u4e00\u628a\u4e5d\u6b65\u68af\u7684\u6210\u672c\u3002
3\u3001\u89e3\u4e0b\u5217\u65b9\u7a0b\u7ec4
\uff081\uff09 \u2475
4\u3001\u7532,\u4e59\u8054\u8d5b\u4e2d,\u67d0\u8db3\u7403\u961f\u6309\u8db3\u534f\u7684\u8ba1\u5206\u89c4\u5219\u4e0e\u672c\u961f\u5956\u52b1\u65b9\u6848\u5982\u4e0b\u8868.
\u80dc\u4e00\u573a \u5e73\u4e00\u573a \u8d1f\u4e00\u573a
\u79ef\u5206 3 1 0
\u5956\u91d1(\u5143/\u4eba) 1500 700 0
\u5f53\u6bd4\u8d5b\u8fdb\u884c\u5230\u7b2c12\u8f6e\u7ed3\u675f\u65f6,\u8be5\u961f\u8d1f3\u573a,\u5171\u79ef19\u5206.
\u95ee:(1)\u8be5\u961f\u80dc,\u5e73\u5404\u51e0\u573a?(2)\u82e5\u6bcf\u8d5b\u4e00\u573a,\u6bcf\u540d\u53c2\u8d5b\u961f\u5458\u5747\u5f97\u51fa\u573a\u8d39500\u5143,\u8bd5\u6c42\u8be5\u961f\u6bcf\u540d\u961f\u5458\u572812\u8f6e\u6bd4\u8d5b\u7ed3\u675f\u540e\u603b\u6536\u5165\u3002
\u53c2\u8003\u7b54\u6848\u5982\u4e0b:
\u89e3\uff1a\uff081\uff09\u4e03\u6b65\u68af\u3001\u4e5d\u6b65\u68af\u7684\u6276\u6746\u957f\u5206\u522b\u662f5\u7c73\u30016\u7c73\uff1b\u6a2a\u6863\u603b\u957f\u5206\u522b\u662f3.5\u7c73\u30013.5\u7c73\uff08\u54041\u5206\uff09\uff1b\u8054\u7ed3\u70b9\u4e2a\u6570\u5206\u522b\u662f14\u4e2a\u300118\u4e2a.
\uff082\uff09\u8bbe\u6276\u6746\u5355\u4ef7\u4e3ax\u5143/\u7c73\uff0c\u6a2a\u6863\u5355\u4ef7\u4e3ay\u5143/\u7c73\u3002\u4f9d\u9898\u610f\u5f97\uff1a
\u5373 \uff0c\u89e3\u5f97 \u3002 \u6545\u4e5d\u6b65\u68af\u7684\u6210\u672c\u4e3a6\u00d73+5.4\u00d72+1\u00d718=46.8(\u5143) (9/).
\u7b54:\u4e00\u628a\u4e5d\u6b65\u68af\u7684\u6210\u672c\u4e3a46.8\u5143\u3002
\u56de\u7b54\u8005\uff1a 452491860 - \u8bd5\u7528\u671f \u4e00\u7ea7 8-21 11:08
...\u6709\u4e9b\u9ebb\u70e6
\u56de\u7b54\u8005\uff1a bumin0312 - \u521d\u5b66\u5f1f\u5b50 \u4e00\u7ea7 8-23 20:54
1\uff0e\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b4x-3y=12\uff0c\u5f53x=0\uff0c1\uff0c2\uff0c3\u65f6\uff0cy=______\uff0e
2\uff0e\u5728x+3y=3\u4e2d\uff0c\u82e5\u7528x\u8868\u793ay\uff0c\u5219y=______\uff0c\u7528y\u8868\u793ax\uff0c\u5219x=______\uff0e
4\uff0e\u628a\u65b9\u7a0b3(x+5)=5(y-1)+3\u5316\u6210\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u4e00\u822c\u5f62\u5f0f\u4e3a______\uff0e
(1)\u65b9\u7a0by=2x-3\u7684\u89e3\u6709______\uff1b
(2)\u65b9\u7a0b3x+2y=1\u7684\u89e3\u6709______\uff1b
(3)\u65b9\u7a0by=2x-3\u4e0e3x+2y=1\u7684\u516c\u5171\u89e3\u662f______\uff0e
9\uff0e\u65b9\u7a0bx+y=3\u6709______\u7ec4\u89e3\uff0c\u6709______\u7ec4\u6b63\u6574\u6570\u89e3\uff0c\u5b83\u4eec\u662f______\uff0e
11\uff0e\u5df2\u77e5\u65b9\u7a0b(k2-1)x2+(k+1)x+(k-7)y=k+2\uff0e\u5f53k=______\u65f6\uff0c\u65b9\u7a0b\u4e3a\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\uff1b\u5f53k=______\u65f6\uff0c\u65b9\u7a0b\u4e3a\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\uff0e
12\uff0e\u5bf9\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b2(5-x)-3(y-2)=10\uff0c\u5f53x=0\u65f6\uff0c\u5219y=______\uff1b\u5f53y=0\u65f6\uff0c\u5219x=______\uff0e
13\uff0e\u65b9\u7a0b2x+y=5\u7684\u6b63\u6574\u6570\u89e3\u662f______\uff0e
14\uff0e\u82e5(4x-3)2+|2y+1|=0\uff0c\u5219x+2=______\uff0e
\u7684\u89e3\uff0e
\u5f53k\u4e3a______\u65f6\uff0c\u65b9\u7a0b\u7ec4\u6ca1\u6709\u89e3\uff0e
______\uff0e
(\u4e8c)\u9009\u62e9
24\uff0e\u5728\u65b9\u7a0b2(x+y)-3(y-x)=3\u4e2d\uff0c\u7528\u542bx\u7684\u4ee3\u6570\u5f0f\u8868\u793ay\uff0c\u5219[ ]
A\uff0ey=5x-3\uff1b
B\uff0ey=-x-3\uff1b
D\uff0ey=-5x-3\uff0e
[ ]
26\uff0e\u4e0e\u5df2\u77e5\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b5x-y=2\u7ec4\u6210\u7684\u65b9\u7a0b\u7ec4\u6709\u65e0\u6570\u591a\u4e2a\u89e3\u7684\u65b9\u7a0b\u662f[ ]
A\uff0e10x+2y=4\uff1b
B\uff0e4x-y=7\uff1b
C\uff0e20x-4y=3\uff1b
D\uff0e15x-3y=6\uff0e
[ ]
A\uff0em=9\uff1b
B\uff0em=6\uff1b
C\uff0em=-6\uff1b
D\uff0em=-9\uff0e
28\uff0e\u82e55x2ym\u4e0e4xn+m-1y\u662f\u540c\u7c7b\u9879\uff0c\u5219m2-n\u7684\u503c\u4e3a [ ]
A\uff0e1\uff1b
B\uff0e-1\uff1b
C\uff0e-3\uff1b
D\uff0e\u4ee5\u4e0a\u7b54\u6848\u90fd\u4e0d\u5bf9\uff0e
29\uff0e\u65b9\u7a0b2x+y=9\u5728\u6b63\u6574\u6570\u8303\u56f4\u5185\u7684\u89e3\u6709[ ]
A\uff0e1\u4e2a\uff1b
B\uff0e2\u4e2a\uff1b
C\uff0e3\u4e2a\uff1b
D\uff0e4\u4e2a\uff0e
[ ]
A\uff0e4\uff1b
B\uff0e2\uff1b
C\uff0e-4\uff1b
D\uff0e\u4ee5\u4e0a\u7b54\u6848\u90fd\u4e0d\u5bf9\uff0e
\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\u7ec4•\u7efc\u5408\u521b\u65b0\u7ec3\u4e60\u9898
\u4e00\u3001\u7efc\u5408\u9898
\u3010Z\uff0c3\uff0c\u4e8c\u3011
\u3010Z\uff0c3\uff0c\u4e8c\u3011
3\uff0e\u5df2\u77e54ax+yb2\u4e0e\uff0da3by\u662f\u540c\u7c7b\u9879\u6c422x\uff0dy\u7684\u503c\uff0e
\u3010Z\uff0c3\uff0c\u4e8c\u3011
4\uff0e\u82e5|x\uff0d2|\uff0b(2x\uff0d3y\uff0b5)2=0\uff0c\u6c42x\u548cy\u7684\u503c\uff0e
\u3010N\uff0c3\uff0c\u4e09\u3011
5\uff0e\u82e5\u65b9\u7a0b2x2m+3\uff0b3y5n-4=7\u662fx\uff0cy\u7684\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\u7ec4\uff0c\u6c42m2\uff0bn\u7684\u503c\uff0e
\u3010Z\uff0c3\uff0c\u4e8c\u3011
\u4e8c\u3001\u521b\u65b0\u9898
1\uff0e\u5df2\u77e5x\u548cy\u4e92\u4e3a\u76f8\u53cd\u6570\uff0c\u4e14(x\uff0by\uff0b4)(x\uff0dy)=4\uff0c\u6c42x\u548cy\u7684\u503c\uff0e
\u3010N\uff0c4\uff0c\u4e09\u3011
2\uff0e\u6c42\u65b9\u7a0bx\uff0b2y=7\u5728\u81ea\u7136\u6570\u8303\u56f4\u5185\u7684\u89e3\uff0e
\u3010N\uff0c4\uff0c\u4e09\u3011
\u4e09\u3001\u4e2d\u8003\u9898
(\u5c71\u4e1c\uff0c95\uff0c3\u5206)\u4e0b\u5217\u7ed3\u8bba\u6b63\u786e\u7684\u662f
[ ]
\u53c2\u8003\u7b54\u6848\u53ca\u70b9\u62e8
\u4e00\u30011\uff0e\u6240\u8003\u77e5\u8bc6\u70b9\uff1a\u65b9\u7a0b\u7ec4\u7684\u89e3\u53ca\u6c42\u4ee3\u6570\u5f0f\u7684\u503c\uff0e
\u2234 2m\uff0b3n=2\u00d72\uff0b3(\uff0d3)=4\uff0d9=\uff0d5\uff0e
2\uff0e\u6240\u8003\u77e5\u8bc6\u70b9\uff1a\u65b9\u7a0b\u7684\u89e3\u53ca\u89e3\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\uff0e
\u89e3\uff1a\u628a x=\uff0d3\uff0cy=\uff0d2\u4ee3\u5165\u65b9\u7a0b\uff0c\u5f97 2(\uff0d3)\uff0d4(\uff0d2)\uff0b2a=3\u89e3\u5173
\u70b9\u62e8\uff1a\u4ee5\u4e0a\u4e24\u9898\u8003\u5bdf\u7684\u77e5\u8bc6\u70b9\u7c7b\u4f3c\uff0c\u5df2\u77e5\u65b9\u7a0b\u7684\u89e3\u65f6\uff0c\u53ea\u8981\u628a\u8fd9\u7ec4\u6570\u4ee3\u5165\u65b9\u7a0b\u6216\u65b9\u7a0b\u7ec4\u5c31\u53ef\u6c42\u51fa\u65b9\u7a0b\u4e2d\u5176\u4ed6\u5b57\u6bcd\u7684\u503c\uff0e
3\uff0e\u6240\u8003\u77e5\u8bc6\u70b9\uff1a\u540c\u7c7b\u9879\u53ca\u89e3\u65b9\u7a0b
\u70b9\u62e8\uff1a\u6839\u636e\u540c\u7c7b\u9879\u7684\u5b9a\u4e49\u77e5\uff0c\u76f8\u540c\u5b57\u6bcd\u7684\u6307\u6570\u76f8\u540c\uff0c\u6545\u53ef\u5217\u51fa\u65b9\u7a0b\uff0c\u4ece\u800c\u6c42\u89e3\uff0e
4\uff0e\u6240\u8003\u77e5\u8bc6\u70b9\uff1a\u975e\u8d1f\u6570\u7684\u6027\u8d28\u53ca\u89e3\u7b80\u5355\u7684\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\u7ec4\uff0e
\u70b9\u62e8\uff1a\u56e0|x\uff0d2|\u22650\uff0c(2x\uff0d3y\uff0b5)2\u22650\uff0c\u6240\u4ee5\uff0c\u5f53\u5b83\u4eec\u7684\u548c\u4e3a\u96f6\uff0c\u8fd9\u4e24\u4e2a\u6570\u90fd\u987b\u662f\u96f6\uff0c\u5373x\uff0d2=0\uff0c2x\uff0d3y\uff0b5=0\uff0e
5\uff0e\u6240\u8003\u77e5\u8bc6\u70b9\uff1a\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5b9a\u4e49\uff0e
\u89e3\uff1a\u7531\u9898\u610f\u77e5
\u70b9\u62e8\uff1a\u4ece\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5b9a\u4e49\u77e5\uff0c\u672a\u77e5\u9879\u7684\u6307\u6570\u4e3a 1\uff0c\u7531\u6b64\u5f97\u5230 2m\uff0b3=1\uff0c 5n\uff0d4=1\uff0e
\u4e8c\u30011\uff0e\u6240\u8003\u77e5\u8bc6\u70b9\uff1a\u76f8\u53cd\u6570\u7684\u610f\u4e49\u53ca\u89e3\u7b80\u5355\u7684\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\u7ec4\uff0e
\u89e3\uff1a\u7531\u9898\u610f\uff0c\u5f97x\uff0by=0\uff0c
\u53c8\u2235(x\uff0by\uff0b4)(x\uff0dy)=4
\u2234 4(x\uff0dy)=4
\u5373x\uff0dy=1
2\uff0e\u6240\u8003\u77e5\u8bc6\u70b9\uff1a\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u81ea\u7136\u6570\u89e3\uff0e
\u89e3\uff1a\u628a\u65b9\u7a0bx\uff0b2y=7\u53d8\u5f62\uff0c\u5f97x=7\uff0d2y
\u4ee4y=1\uff0c2\uff0c3\uff0c4\u2026\u2026\uff0c\u5219x=5\uff0c3\uff0c1\uff0c\uff0d1\u2026\u2026
\u70b9\u62e8\uff1a\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u81ea\u7136\u6570\u89e3\uff0c\u5c31\u662f\u672a\u77e5\u6570\u7684\u503c\uff0c\u90fd\u662f\u81ea\u7136\u6570\uff0c\u9996\u5148\u5c06\u65b9\u7a0b\u53d8\u5f62\uff0c\u7528\u542b\u4e00\u4e2a\u5b57\u6bcd\u7684\u4ee3\u6570\u5f0f\u8868\u793a\u53e6\u4e00\u4e2a\u5b57\u6bcd\uff0c\u518d\u6839\u636e\u9898\u76ee\u7684\u7279\u70b9\u6c42\u89e3\uff0e
\u4e09\u3001\u6240\u8003\u77e5\u8bc6\u70b9\uff1a\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\u7ec4\u89e3\u7684\u5b9a\u4e49\uff0e
\u89e3\uff1aD
\u70b9\u62e8\uff1a\u7531\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\u7ec4\u7684\u5b9a\u4e49\u77e5\u9053\uff0c\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\u7ec4\u7684\u89e3\uff0c\u662f\u65b9\u7a0b\u7ec4\u4e2d\u6bcf\u4e2a\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\u7ec4\u7684\u89e3\uff0c\u6545\u9009D\uff0e
(1\uff09 y=2x-7
{ 5x+3y+2z=2
3x-4z=4
(2) 4x+9y=12
{3y-2z=1
7x+5z=19/4
(3\uff094x-9z=17
{3x+y+5z=18
x+2y+3z=2
(4) 2x+4y+3z=9
{3x-2y+5z=11
5x-6y+7z=13
(5) x:y=3:2
{y:z=5:4
x+y+z=66
式中字母所表示的意义为：a—本金，x—利率(通常用百分数表示)，n—期数(通常用年月日表示)，A.—.本.利.和
去死
绛旓細1銆鍏紡涓嶅悓锛锛1锛夊闀跨巼=锛堝闀垮悗鐨勫-澧為暱鍓嶇殑鍊硷級/澧為暱鍓嶇殑鍊硷紳鍑虹敓鐜囷紞姝讳骸鐜 锛2锛夊闀块熺巼=锛堝闀垮悗鐨勫-澧為暱鍓嶇殑鍊硷級/鏃堕棿 2銆佹蹇典笉鍚岋細锛1锛夊闀跨巼鏄寚锛氬崟浣嶆暟閲忕殑涓綋鍦ㄥ崟浣嶆椂闂村唴鏂板鍔犵殑涓綋鏁般傦紙2锛夊闀块熺巼鏄寚鍗曚綅鏃堕棿鍐呭闀跨殑鏁伴噺.銆3銆丣鍨嬫洸绾垮闀跨巼淇濇寔涓嶅彉锛涘闀块熺巼...
绛旓細绗簩涓細闅旀湡澧為暱鐜銆傚叕寮廹=a+b+ab锛屽鏄洿鎺ュ甫鍏ユ暟鎹绠椼傚崟浣嶆槸锛呫傜涓変釜锛氬熀鏈熼噺B銆傚叕寮廈=A/1+a銆傝冭瘯褰㈠紡澶氭牱銆傜鍥涗釜锛氬闀块噺鈻矨銆傚叕寮忊柍A=A/1+a *a锛屽鐢ㄤ簬鐩存帴璁＄畻锛屾垨鑰呪柍A姣斿ぇ灏忋傜浜斾釜锛氶殧鏈熷熀鏈熼噺G銆鍏紡A=A/1+a+b銆傚鐢ㄤ簬鐩存帴璁＄畻銆傜鍏釜锛氶鏈熼噺X銆鍏紡X=A*锛...
绛旓細琛屾祴璧勬枡鍒嗘瀽澧為暱鐜囧叕寮鍒嗕负浠ヤ笅涓変釜锛1銆佸鍚堝闀跨巼鐨勫叕寮忥紝r=(1+r1)(1+r2)-1=r1+r2+r1脳r2銆2銆佹瘮閲嶅鍑忓叕寮忥紝(A/B)脳(a-b)/(1+a)锛屾敞鎰廰涓哄垎瀛愮殑澧為燂紝b涓哄垎姣嶇殑澧為熴3銆佸嶆暟澧為熺殑鍏紡涓猴紝r=(a-b)/(1+b)锛屾敞鎰廰涓哄垎瀛愮殑澧為燂紝b涓哄垎姣嶇殑澧為熴備粠杩欎笁涓叕寮忔潵鐪嬶紝鎴戜滑鍦...
绛旓細(1)澧為暱鐜闂鐨勬湁鍏鍏紡: 澧為暱鏁=鍩烘暟脳澧為暱鐜,瀹為檯鏁=鍩烘暟+澧為暱鏁 (2)涓ゆ澧為暱,涓斿闀跨巼鐩哥瓑鐨勯棶棰樼殑鍩烘湰绛夐噺鍏崇郴寮忎负: 鍘熸潵鐨劽(1+澧為暱鐜)澧為暱鏈熸暟=鍚庢潵鐨 (1)涓婅堪鐩哥瓑鍏崇郴浠呴傜敤澧為暱鐜囩浉鍚岀殑鎯呭舰; (2)濡傛灉鏄笅闄嶇巼,鍒欎笂杩板叧绯诲紡涓: 鍘熸潵鐨劽(1-澧為暱鐜)涓嬮檷鏈熸暟=鍚庢潵鐨6銆佸埄鐢ㄤ竴鍏冧簩娆℃柟绋嬭В鍑犱綍...
绛旓細r=螖X/B=(A-B)/B=螖X/(A-螖X)=A/B-1 澧為暱鐜=澧為暱閲/鍩烘湡閲=锛堢幇鏈熼噺-鍩烘湡閲忥級/鍩烘湡閲=澧為暱閲/锛堢幇鏈熼噺-澧為暱閲忥級=鐜版湡閲/鍩烘湡閲-1
绛旓細绛
绛旓細骞冲潎鏁扮殑澧為暱鐜囨槸鎸囩幇鏈熷钩鍧囨暟杈冧簬鍩烘湡骞冲潎鏁扮殑澧為暱骞呭害銆傚闀块噺=鐜版湡閲忥紞鍩烘湡閲忋傚闀块噺=鍩烘湡閲徝楀闀跨巼銆傚闀块噺=鐜版湡閲/锛1+澧為暱鐜囷級脳澧為暱鐜囥傚钩鍧囨暟鐨勫闀跨巼鐨勭畝鍗曡娉曪細绗竴锛屾瘮杈冨垎姣嶃傚钩鍧囨暟澧為暱鐜囧叕寮鏄垎姣嶆槸1+b,鍩烘湡骞冲潎鏁颁笌涓ゆ湡姣旇緝鍏紡鍒嗘瘝鏄1+a锛屽湪璁板繂鏃讹紝鍙璁颁綇鈥滃钩鍧囨暟澧為暱鐜...
绛旓細娌¤杩囪繖鏍风殑澧為暱鐜寮忓瓙銆傝绠楀鍒╃殑鏃跺欐槸鍓嶉潰鐨勫紡瀛愶紝灏卞儚浣犵涓骞存專a锛屾瘡骞翠互x%澧為暱锛屾眰涓夊勾涓鍏辨專澶氬皯 鍚庨潰鐨勫紡瀛愭槸绗笁骞存專澶氬皯銆傚嵆鍓嶉潰鏄眰鎵鏈夌殑鍜岋紝鍚庨潰鏄眰鍗曠嫭涓骞寸殑
绛旓細璁＄畻杩囩▼濡備笅锛氭牴鎹鎰忓彲璁＄畻 锛5.1%+4.9%+6%+5.6%+4.5%锛/5 =26.1%/5 =5.22
绛旓細x鏄澧為暱鐜 a鏄涓骞寸殑 c鏄n骞寸殑
