12.9=x+7.1.

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Solution for 12.9=x+7.1. equation: 



12.9=x+7.1.

We move all terms to the left:

12.9-(x+7.1.)=0

We add all the numbers together, and all the variables

-(+x)+12.9=0

We get rid of parentheses

-x+12.9=0

We add all the numbers together, and all the variables

-1x+12.9=0

We move all terms containing x to the left, all other terms to the right

-x=-12.9

x=-12.9/-1

x=12+0.9/1

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