(14-10)×30+(x-15)×20=300 (x-15)X20=240方程怎么解？
\u4e09\u9053\u516d\u5e74\u7ea7\u7684\u6570\u5b66\u9898\uff01\u6025\uff011.\u7b2c\u4e00\u5929\u5b8c\u6210\u603b\u957f\u5ea6\u76841/3
\u518d\u4fee15\u5343\u7c73\u5c31\u53ef\u5b8c\u6210\u8fd9\u6761\u516c\u8def\u76841/2
\u6240\u4ee515\u5343\u7c73\u5bf9\u5e94\u603b\u957f\u5ea6\u7684\uff1a1/2-1/3=1/6
\u8fd9\u6761\u516c\u8def\u5168\u957f\u662f\uff1a15\u00f71/6=90(\u5343\u7c73)
2.1.6\u7c73=16\u5206\u7c73 1.4\u7c73=14\u5206\u7c73
\u957f\u65b9\u5f62\u7684\u9762\u79ef\u662f\uff1a16\u00d714=224(\u5e73\u65b9\u5206\u7c73)
\u8981\u4f7f\u6b63\u65b9\u5f62\u7684\u9762\u79ef\u6700\u5927\u4e14\u6ca1\u6709\u5269\u4f59
\u90a3\u4e48\u6b63\u65b9\u5f62\u7684\u8fb9\u957f\u5c31\u662f16\u548c14\u7684\u6700\u5927\u516c\u7ea6\u6570
\u800c16\u548c14\u7684\u6700\u5927\u516c\u7ea6\u6570\u662f\uff1a(16,14)=2
\u6240\u4ee5\u6b63\u65b9\u5f62\u7684\u8fb9\u957f\u662f2\u5206\u7c73
\u4e00\u4e2a\u6b63\u65b9\u5f62\u7684\u9762\u79ef\u662f\uff1b2\u00d72=4(\u5e73\u65b9\u5206\u7c73)
\u6700\u591a\u80fd\u5206\u5272\u6210\uff1a224\u00f74=56(\u4e2a)
3.\u65b9\u7a0b\u6cd5\uff1a
\u8bbe\u6bcf\u4e2a\u8db3\u7403x\u5143\uff0c\u5219\u6bcf\u4e2a\u7bee\u7403(x+15)\u5143
20(x+15)+10x=1650
20x+300+10x=1650
30x=1350
x=45
45+15=60(\u5143)
\u7b54\uff1a\u6bcf\u4e2a\u8db3\u740345\u5143\uff0c\u6bcf\u4e2a\u7bee\u740360\u5143\u3002
\u7b97\u672f\u6cd5\uff1a
\u5047\u8bbe\u90a310\u4e2a\u8db3\u7403\u4e70\u7684\u662f\u7bee\u7403\uff0c\u8981\u591a\u4ed8\u51fa\uff1a10\u00d715=150(\u5143)
\u90a3\u4e4820+10=30\u4e2a\u7bee\u7403\u4e00\u5171\u8981\u4ed8\u51fa\uff1a1650+150=1800(\u5143)
\u5219\u4e00\u4e2a\u7bee\u7403\uff1a1800\u00f730=60(\u5143)
\u800c\u4e00\u4e2a\u8db3\u7403\uff1a60-15=45(\u5143)
\u8fd9\u4e2a\u89e3\u65b9\u7a0b\u6700\u597d\u5c31\u662f\u5148\u7528240\u00f720\uff0c\u4ed6\u5c31\u4f1a\u548c\u5de6\u8fb9\u62ec\u53f7\u91cc\u7684\u6570\u636e\u76f8\u7b49\u7684\uff0c\u8fd9\u6837\u5c31\u5f97\u5230\u4e86x- 15=12\uff0c\u63a5\u4e0b\u6765\u5c31\u662f\u628a15\u79fb\u5230\u53f3\u8fb9\u53bb\u76f8\u52a0\u5c31\u53ef\u4ee5\u4e86\uff0c\u6700\u540e\u5c31\u5f97\u5230\u4e86X=27
120+20x-300=30020x=480
x=24
绛旓細3x+锛10-x锛=14 10+2x=14 2x=4 x=2
绛旓細瑙ｏ細璁撅細杩欎釜鏁扮瓑浜嶺銆2鍒嗕箣1x锛圶-1锛=2-5鍒嗕箣1 2鍒嗕箣1x锛圶-1锛=5鍒嗕箣9 X=5鍒嗕箣9 梅2鍒嗕箣1+1 X=5鍒嗕箣23
绛旓細3鍒嗕箣1(x-1)=-3鍒嗕箣2(x+3)+1 涔樹互3寰 x-1=-2(x+3)+3 x-1=-2x-6+3 x+2x=-3+1 3x=-2 x=-2/3 5鍒嗕箣x-2-3鍒嗕箣2x-5=10鍒嗕箣x+3-3 涔樹互30寰 6(x-2)-10(2x-5)=3锛坸+3锛-90 6x-12-20x+50=3x+9-90 -14x-3x=-81-38 -17x=-119 x=119/17 x=7 ...
绛旓細瑙ｏ細30-3x3x=14x2 30-9x=28 -9x=28-30 -9x=-2 x=2/9 绛旓細鍘熶竴鍏冧竴娆℃柟绋嬬殑瑙ｆ槸x=2/9銆
绛旓細1/20X+1/12X(14-x)=1 涓よ竟涔60 3x+5(14-x)=60 3x-5x+70=60 2x=70-60 2x=10 x=5
绛旓細鍥
绛旓細璁総=10^x,鍘熸柟绋嬪寲涓猴紝t-1/t=1鍗硉*t-t-1=0 t=(1+鏍瑰彿5)/2 x=lg(1+鏍瑰彿5)/2
绛旓細(2)x/3=1+ 5-3x/2 2x=6+3(5-3x) 11x=21 x=21/11 (3)x-3/3- 1/2=4 2x-9=24 2x=33 x=33/2 (4)3y-1/4 - 1=5y-7/6 9y-3-12=10y-14 -y=1 y=-1 (5)2x/3+ x/2=28 4x+3x=28 7x=28 x=4 (6)5-x/4 - 6-2x/4=10 5-x-6+2x=10 x=11 (7)y-2/6 =y/...
绛旓細(12鍒嗕箣1-x)x14=1-10鍒嗕箣3 (12鍒嗕箣1-x)x14=10鍒嗕箣7 12鍒嗕箣1-x=20鍒嗕箣1 x=12鍒嗕箣1-20鍒嗕箣1 x=30鍒嗕箣1
绛旓細棣栧厛锛屽皢鐧惧垎鏁拌浆鍖栦负灏忔暟锛屽嵆85% = 0.85锛屽皢寮忓瓙浠ｅ叆寰楋細10x - 0.85 * 10(x+1) = 14 鐒跺悗锛屽皢鍙充晶鐨勫紡瀛愯繘琛岃绠楋紝寰楀埌锛10x - 8.5(x+1) = 14 灏嗗彸渚х殑8.5(x+1)杩涜鍒嗛厤鍜屽悎骞跺悓绫婚」锛屽緱鍒帮細10x - 8.5x - 8.5 = 14 鍖栫畝寰楋細1.5x = 22.5 鍥犳锛岃В鏂圭▼寰楋細x = 15 鍥...
