120/x=120/(1.5x)+1 Y
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120/x=120/(1.5x)+1Y120/x=120/(1.5x)+1Y120/x=120/(1.5x)+1Y120/x=120/(1.5x)+1120/x-80/x=140/x=1x=40什么?
120/x=120/(1.5x)+1 Y
120/x=120/(1.5x)+1
Y
120/x=120/(1.5x)+1 Y
120/x=120/(1.5x)+1
120/x-80/x=1
40/x=1
x=40
什么?
楼上那家没写解,等号也没对齐
120/x=120/(1.5x)+1
120/x=(120除以1.5)x+1
120/x=80x+1
120x-80x=1
40x=1
x=1除以40
x=1/40
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