初一的二元一次方程！
\u521d\u4e00\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\u5df2\u77e5\uff1a\u75282\u8f86A\u578b\u8f66\u548c1\u8f86B\u578b\u8f66\u88c5\u6ee1\u8d27\u7269\u4e00\u6b21\u53ef\u8fd010\u5428\uff1b\u75281\u8f86A\u578b\u8f66\u548c2\u8f86B\u578b\u8f66\u88c5\u6ee1\u8d27\u7269\u4e00\u6b21\u53ef\u8fd011\u5428\uff0c\u67d0\u7269\u6d41\u516c\u53f8\u73b0\u670931\u5428\u8d27\u7269\uff0c\u8ba1\u5212\u540c\u65f6\u79df\u7528A\u578b\u8f66a\u8f86\uff0cB\u578b\u8f66b\u8f86\uff0c\u4e00\u6b21\u8fd0\u5b8c\uff0c\u4e14\u6070\u597d\u6bcf\u8f86\u8f66\u90fd\u88c5\u6ee1\u8d27\u7269\u3002\u6839\u636e\u4ee5\u4e0a\u4fe1\u606f\uff0c\u89e3\u7b54\u4e0b\u5217\u95ee\u9898\uff1a
\uff081\uff091\u8f86A\u578b\u8f66\u548c\u4e00\u8f86B\u578b\u8f66\u90fd\u8f6c\u6ee1\u8d27\u7269\u4e00\u6b21\u53ef\u5206\u522b\u8fd0\u8d27\u7269\u591a\u5c11\u5428\uff1f
\uff082\uff09\u8bf7\u4f60\u5e2e\u8be5\u7269\u6d41\u516c\u53f8\u8bbe\u8ba1\u79df\u8f66\u65b9\u6848
\uff083\uff09\u82e5A\u578b\u8f66\u6bcf\u8f86\u9700\u79df\u91d1100\u5143\u4e00\u6b21\uff0cB\u578b\u8f66\u6bcf\u8f86\u9700\u79df\u91d1120\u5143\u4e00\u6b21\uff0c\u8bf7\u9009\u51fa\u6700\u7701\u94b1\u7684\u79df\u8f66\u65b9\u6848\uff0c\u5e76\u6c42\u51fa\u6700\u5c11\u79df\u8f66\u8d39
\uff081\uff09\u8fde\u5217\u65b9\u7a0b\u7ec4\uff0c\u8bbeA\u8f66\u6bcf\u8f86\u4e00\u6b21\u8fd0X\u5428\uff0cB\u6bcf\u8f86\u4e00\u6b21Y\u5428\u3002
2X+Y=10
X+2Y=11
\u89e3\u5f97 X=3\uff0cY=4
\u6240\u4ee5 \u4e00\u8f86A\u578b\u8f66\u6ee1\u8f7d\u8d27\u7269\u4e00\u6b21\u8fd0\u8d273\u5428\uff0cB\u578b\u8f66\u6ee1\u8f7d\u8d27\u7269\u4e00\u6b21\u8fd0\u8d274\u5428\u3002
\uff082\uff09a\u8f86A\uff0cb\u8f86B \u7531\u4e00\u5c0f\u9898\u5df2\u77e5 A\u4e00\u6b213\u5428\uff0cB\u4e00\u6b214\u5428 \u5171\u8fd031\u5428 \u4e00\u6b21\u8fd0\u5b8c
\u5217\u65b9\u7a0b\uff1a3a+4b=31
\u53ef\u89e3\u7684 a=1\uff0cb=7\uff1ba=5\uff0cb=4\uff1ba=9\uff0cb=1.\u4e09\u79cd\u79df\u8f66\u65b9\u6848
\uff083\uff09\u7531\u4e8c\u5c0f\u9898\u7684\u7684\u4e09\u79cd\u79df\u8f66\u65b9\u6848\u6bd4\u8f83\u54ea\u79cd\u65b9\u6848\u6700\u7701\u94b1
\u4e09\u6761\u65b9\u7a0b \uff1a100a+120b=y\u3002\u5206\u522b\u628a\u4e8c\u5c0f\u9898\u7684a\uff0cb\u503c\u5e26\u5165
a=1\uff0cb=7\u65f6\u3002\u89e3\u5f97y=940
a=5\uff0cb=4\u65f6\u3002\u89e3\u5f97y=980
a=9\uff0cb=1\u65f6\u3002\u89e3\u5f97y=920.
\u6240\u4ee5\u9009\u53d6\u7b2c\u4e09\u79cd\u65b9\u6848 9\u8f86A\u8f66\u548c1\u8f86B\u8f66\u6700\u5c11\u79df\u8f66\u8d39920\u5143\u3002
\u89e3:\u8bbe\u5317\u4eac\u7ed9\u91cd\u5e86x\u53f0,\u7ed9\u6b66\u6c4910-x\u53f0\u3002\u4e0a\u6d77\u7ed9\u91cd\u5e86y\u53f0\uff0c\u7ed9\u6b66\u6c494-y\u53f0\u3002
\u7531\u9898\u610f\uff0c\u5f97\uff1ax+y=8
800x+400(10-x)+500y+300(4-y)=7600
\u89e3\uff0c\u5f97\uff1ax=4 10-x=6
y=4 4-y=0
\u7b54\uff1a\u5317\u4eac\u7ed9\u91cd\u5e864\u53f0\uff0c\u7ed9\u6b66\u6c496\u53f0\u3002\u4e0a\u6d77\u7ed9\u91cd\u5e864\u53f0\uff0c\u7ed9\u6b66\u6c490\u53f0\u3002
卡车一次运货y吨。
5x+4y=24①
10x+2y=21②
①×2得
10x+8y=48
①-②得
10x+8y-（10x+2y）=48-21
10x+8y-10x-2y=27
6y=27
y=4.5
将y=4.5带入①得
x=1.2
所以原方程的解为x=1.2
y=4.5
答：胶轮大车一次运货1.2吨，
卡车一次运货4.5吨。
自己做啦。
绛旓細瑙ｏ細1. (y/2)+(x/3)=13锛(y/3)-(x/4)=3锛屾妸杩欎釜鏂圭▼缁勫彉褰㈠緱锛3y+2x=78锛4y-3x=36锛岃В寰楋細x=12锛寉=18銆2. (x+y)/2+(x-y)/3=6锛 4(x+y)-5(x-y)=2鎶婅繖涓柟绋嬬粍鍙樺舰寰楋細5x+y=36锛-x+9y=2锛岃В寰楋細x=7锛寉=1銆3. (x+3)/2+(y+5)/3=7锛(x-4)/3...
绛旓細1銆5X+3Y=17 4X+2Y=13 瑙ｅ緱锛歑=2.5 Y=1.5 2銆佺敳瀹氫环锛歑*0.5+X=1.5X 涔欏畾浠凤細Y*0.4+Y=1.4Y X+Y=500 1.5X*0.9+1.4Y*0.9=500+157 瑙ｅ緱锛歑=200 Y=300 3銆乆+Y=28 12X=18Y*2 瑙ｅ緱锛歑=21 Y=7 ...
绛旓細锛1锛夎В锛氳灏忎笢璇惧璇荤墿鏈墄鏈紝灏忔槑鏈墆鏈1. y=2x 2. 3(y-10)=x+10 鐢2锛屽緱锛3y-x=40 灏1浠ｅ叆锛屽緱x=8.y=2x8=16(鏈)绛旓細灏忎笢鏈8鏈澶栬鐗╋紝灏忔槑鏈16鏈傦紙2锛夎В锛氳搴蜂箖棣▁鍏/鏀紝姘翠粰鑺眣鍏/鍙1. 3x+y=19 2. 2x+2y=18 鐢1寮 x 2锛屽緱锛6x+2y=38 灏...
绛旓細1) 66x+17y=3967 25x+y=1200 绛旀锛歺=48 y=47 (2) 18x+23y=2303 74x-y=1998 绛旀锛歺=27 y=79 (3) 44x+90y=7796 44x+y=3476 绛旀锛歺=79 y=48 (4) 76x-66y=4082 30x-y=2940 绛旀锛歺=98 y=51 (5) 67x+54y=8546 71x-y=5680 绛旀锛歺=80 y=59 (6) 42x-95y=...
绛旓細绗竴棰橈細鑻 x=1, y= -2 , 鍒 ax -2y =6 , 鍗砤 + 4 = 6 , 鏈缁堝彲寰 a = 2 ;鍒 3x -by= -5 , 鍗 3 +2b = -5 ,鏈缁堝彲寰梑 = -4 ;鍒欐渶缁堝彲寰梐 + b = 2;绗簩棰橈細鑻 x = -2 , y = 2 , 閭ｄ箞2x+ y = m , 鍒欏彲寰 -4 + 2 = m ,鍗冲緱鍒癿 = ...
绛旓細1銆2x+9y=81 3x+y=34 x==9,y=7 2銆9x+4y=35 8x+3y=30 x=3锛寉=2 3銆7x+2y=52 7x+4y=62 x=6锛寉=5 4銆4x+6y=54 9x+2y=87 x=9,y=3 5銆2x+y=7 2x+5y=19 x=2锛寉=3
绛旓細绛旀锛歺=89 y=30 62x-98y=-2564 46x-y=2024 绛旀锛歺=44 y=54 79x-76y=-4388 26x-y=832 绛旀锛歺=32 y=91 63x-40y=-821 42x-y=546 绛旀锛歺=13 y=41 69x-96y=-1209 42x+y=3822 绛旀锛歺=91 y=78 85x+67y=7338 11x+y=308 绛旀锛歺=28 y=74 78x+74y=12928 14x+...
绛旓細8x+3y=30 3.7x+2y=52 7x+4y=62 4.4x+6y=54 9x+2y=87 5.2x+y=7 2x+5y=19 6.x+2y=21 3x+5y=56 7.5x+7y=52 5x+2y=22 8.5x+5y=65 7x+7y=203 9.8x+4y=56 x+4y=21 10.5x+7y=41 5x+8y=44 11.7x+5y=54 3x+4y=38 12.x+8y=15 4x+y=29 13.3x+6y=24 9x+5y...
绛旓細瑙ｏ細璁剧妞嶆潹鏍憍妫碉紝鏉炬爲y妫点傚垯x=1/2锛坸+y)+11锛寉=1/3锛坸+y)-2 x-y=22锛寈-2y=6 x=38锛寉=16 绛旓細绉嶆鏉ㄦ爲38妫碉紝鏉炬爲16妫点
绛旓細浠ｅ叆3/4x=3/5y (3/4)x=(3/5)(162-x)(1/4)x=(1/5)(162-x)涓よ竟涔20 5x=4(162-x)=648-4x 9x=648 x=72 y=162-x=90 3x+7y=13 (1)4x-7y=1 (2)(1)+(2)7x=14 x=2 浠ｅ叆(1),6+7y=13 7y=7,y=1 2x+5y=13(1)3x-4y=18(2)(1)*4+(2)*5 8x+20y+15x-20y...
