12.5=3.1+x

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Solution for 12.5=3.1+x equation: 



12.5=3.1+x

We move all terms to the left:

12.5-(3.1+x)=0

We add all the numbers together, and all the variables

-(x+3.1)+12.5=0

We get rid of parentheses

-x-3.1+12.5=0

We add all the numbers together, and all the variables

-1x+9.4=0

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

-x=-9.4

x=-9.4/-1

x=9+0.4/1

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