-x-12=-3x-4

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Solution for -x-12=-3x-4 equation: 



-x-12=-3x-4

We move all terms to the left:

-x-12-(-3x-4)=0

We add all the numbers together, and all the variables

-1x-(-3x-4)-12=0

We get rid of parentheses

-1x+3x+4-12=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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