12+5x=2x-9x

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Solution for 12+5x=2x-9x equation: 



12+5x=2x-9x

We move all terms to the left:

12+5x-(2x-9x)=0

We add all the numbers together, and all the variables

5x-(-7x)+12=0

We get rid of parentheses

5x+7x+12=0

We add all the numbers together, and all the variables

12x+12=0

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

12x=-12

x=-12/12

x=-1

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