200+0.4x+(200+0.4x) * 0.5 = x怎么解!,过程!
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200+0.4x+(200+0.4x) * 0.5 = x
怎么解!,过程!
200+0.4x+(200+0.4x) * 0.5 = x
200+0.4x+100+0.2x=x
300+0.6x=x
0.4x=300
x=750
200+0.4x+(200+0.4x) * 0.5 = x
怎么解!,过程!
200+0.4x+(200+0.4x) * 0.5 = x
200+0.4x+100+0.2x=x
300+0.6x=x
0.4x=300
x=750