12.8-5x=4.8-x解方程

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12.8-5x=4.8-x解方程12.8-5x=4.8-x解方程12.8-5x=4.8-x解方程12.8-5x=4.8-x12.8-4.8=5x-x8=4xx=212.8-4.8=5x-x,8=4x,

12.8-5x=4.8-x解方程
12.8-5x=4.8-x解方程

12.8-5x=4.8-x解方程
12.8-5x=4.8-x
12.8-4.8=5x-x
8=4x
x=2

12.8-4.8=5x-x , 8=4x , 所以求得x=2