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数学
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20x+50/4+10x-30/6=12x
人气:412 ℃ 时间:2020-04-29 07:51:21
解答
两边乘12
3(20x+50)+2(10x-30)=12×12x
60x+150+20x-60=144x
144x-60x-20x=150-60
64x=90
x=90÷64
x=45/32
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(10X+20)/50- (12X-30)/54=0.5
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(10x+20)÷50=(12x-30)÷54+0.
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