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数学
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①:50*(x+0.2)=60*(x-1) ②:50*(x-2+8)=(50+10)*(x-2-5)
人气:321 ℃ 时间:2020-02-04 11:18:28
解答
① 50(x+0.2)=60(x-1),50x+10=60x-60,10x=70,x=7.②50(x-2+8)=(50+10)(x-2-7),50(x+6)=60(x-9),50x+300=60x-540,10x=840,x=84.
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