5.4x+x=12.8

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5.4x+x=12.85.4x+x=12.85.4x+x=12.85.4x+x=12.86.4x=12.8x=26.4X=12.8X=12.8/6.4X=25.4x+x=12.8x(5.4+1)=12

5.4x+x=12.8
5.4x+x=12.8

5.4x+x=12.8
5.4x+x=12.8
6.4x=12.8
x=2

6.4X=12.8
X=12.8/6.4
X=2

5.4x+x=12.8
x(5.4+1)=12.8
6.4x=12.8
x=2

5.4x+x=12.8
(5.4+1)x=12.8
6.4x=12.8x=2
xieshangjie

5.4x+x=12.8
(5.4+1)x=12.8
6.4x=12.8
x=2

5.4x+x=12.8
6.4x=12.8
x=2
行行好,给个分分吧!~~我不容易啊!~~呜呜呜!~~