12+3x=-7x-8

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Solution for 12+3x=-7x-8 equation: 



12+3x=-7x-8

We move all terms to the left:

12+3x-(-7x-8)=0

We get rid of parentheses

3x+7x+8+12=0

We add all the numbers together, and all the variables

10x+20=0

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

10x=-20

x=-20/10

x=-2

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