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数学
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3(0.7x+0.1)+2(0.25x-0.2)=5.1的解(要过程)
做了半天没做对
哎呀,原来是落了个x,自己看出来了
人气:354 ℃ 时间:2020-02-05 08:30:39
解答
3(0.7x+0.1)+2(0.25x-0.2)=5.1
2.1x+0.3+0.5x-0.4=5.1
2.6x=5.2
x=2
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解方程3(0.7x+0.1)+2(0.25x-0.2)=5.1
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