一元一次方程
∵ 2(20%X+X-210)=3(210-20%X)
∴ 2(1.2X-210)=3(210-0.2X)
∴ 2.4X-420=630-0.6X
∴ 3X=1050
∴ X=350
2(20%X+X-210)=3(210-20%X)怎么解（写全过程）
2(20%X+X-210)=3(210-20%X)怎么解（写全过程）
数学人气：877 ℃时间：2020-02-05 17:49:50
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