50%X-(1000-X)10%=1000×39.2%怎么解
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50%X-(1000-X)10%=1000×39.2%怎么解
![50%X-(1000-X)10%=1000×39.2%怎么解](/uploads/image/z/17960246-62-6.jpg?t=50%EF%BC%85X%EF%BC%8D%EF%BC%881000%EF%BC%8DX%EF%BC%8910%EF%BC%85%EF%BC%9D1000%C3%9739.2%EF%BC%85%E6%80%8E%E4%B9%88%E8%A7%A3)
50%X-(1000-X)10%=1000×39.2%
0.5X-0.1(1000-X)=392
0.5X-100+0.1X=392
0.5X+0.1X=392+100
0.6X=492
X=492÷0.6
X=820
0.5X-0.1(1000-X)=392
0.5X-100+0.1X=392
0.5X+0.1X=392+100
0.6X=492
X=492÷0.6
X=820