-x = - 2/5x + 1 2x - 1/3 = - x/3 +2 怎么计算?
1个回答
-x = - 2/5x + 1
-x+2/5x=1
-3/5x=1
x=-5/3
2x - 1/3 = - x/3 +2
6x-1=-x+6
7x=7
x=1
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