-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 add all the numbers together, and all the variables

-3x-(-1x-20)-12=0

We get rid of parentheses

-3x+1x+20-12=0

We add all the numbers together, and all the variables

-2x+8=0

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

-2x=-8

x=-8/-2

x=+4

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