-12=x+7x+4

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Solution for -12=x+7x+4 equation: 



-12=x+7x+4

We move all terms to the left:

-12-(x+7x+4)=0

We add all the numbers together, and all the variables

-(8x+4)-12=0

We get rid of parentheses

-8x-4-12=0

We add all the numbers together, and all the variables

-8x-16=0

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

-8x=16

x=16/-8

x=-2

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