12+3.4x-5.4x=-x

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Solution for 12+3.4x-5.4x=-x equation: 



12+3.4x-5.4x=-x

We move all terms to the left:

12+3.4x-5.4x-(-x)=0

We add all the numbers together, and all the variables

3.4x-5.4x-(-1x)+12=0

We add all the numbers together, and all the variables

-2x-(-1x)+12=0

We get rid of parentheses

-2x+1x+12=0

We add all the numbers together, and all the variables

-1x+12=0

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

-x=-12

x=-12/-1

x=+12

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