5%X+(500-X)×4%=23.5这个方程怎么解

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5%X+(500-X)×4%=23.5这个方程怎么解
5%X+(500-X)×4%=23.5这个方程怎么解

5%X+(500-X)×4%=23.5这个方程怎么解
5%X+(500-X)×4%=23.5
即5%X+500×4%-X×4%=23.5
即5%X-X×4%=23.5-500×4%=23.5-20=3.5
即1%X=3.5
即1/100X=3.5
即X=350

1%X=23.5-20
x=500

5%X+(500-X)×4%=23.5
5%x+20-4%x=23.5
5%x-4%x=23.5-20
1%x=3.5
x=3.5÷1%
x=350

4%=0.04
0.05x+20-0.04x=23.5
0.01x=3.5
x=350

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