-7=8+3x+12

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



-7=8+3x+12

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(3x+20)-7=0

We get rid of parentheses

-3x-20-7=0

We add all the numbers together, and all the variables

-3x-27=0

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

-3x=27

x=27/-3

x=-9

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