（x+30）*62.5%+240=(x+30+24 - 知识问答

（x+30）*62.5%+240=(x+30+240)*75%

1个回答

（x+30）*62.5%+240=(x+30+240)*75%
0.625（x+30）+240=0.75(x+270)
0.625x+18.75+240=0.75x+202.5
0.75x-0.625x=18.75+240-202.5
0.125x=56.25
x=56.25÷0.125
=450

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