140-(x-140)=40%X怎么解

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140-(x-140)=40%X怎么解140-(x-140)=40%X怎么解140-(x-140)=40%X怎么解140-(x-140)=40%X截140-x+140=0.4xx+0.4x=2801.

140-(x-140)=40%X怎么解
140-(x-140)=40%X怎么解

140-(x-140)=40%X怎么解
140-(x-140)=40%X

140-x+140=0.4x
x+0.4x=280
1.4x=280
x=200

140-(x-140)=40%X
140-x+140=0.4x
280=0.4x+x
1.4x=280
x=200