解方程0.5x+2/0.3-x=0.2(0.5x+2)/0.2-11/12
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解方程0.5x+2/0.3-x=0.2(0.5x+2)/0.2-11/12
解方程0.5x+2/0.3-x=0.2(0.5x+2)/0.2-11/12
解方程0.5x+2/0.3-x=0.2(0.5x+2)/0.2-11/12
0.5x+2/0.3-x=0.2(0.5x+2)/0.2-11/12
0.5x+2/0.3-x=(0.5x+2)-11/12
0.5x-x-0.5x=2-11/12-2/0.3
-x=-67/12
x=67/12=5又7/12
-0.5x+20/3=0.5x+13/12
-0.5x-0.5x+20/3-13/12=0
-x+67/12=0
x=67/12