-3x-12=x+20

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Solution for -3x-12=x+20 equation: 



-3x-12=x+20

We move all terms to the left:

-3x-12-(x+20)=0

We get rid of parentheses

-3x-x-20-12=0

We add all the numbers together, and all the variables

-4x-32=0

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

-4x=32

x=32/-4

x=-8

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