X+12=-3x-12

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



X+12=-3X-12

We move all terms to the left:

X+12-(-3X-12)=0

We get rid of parentheses

X+3X+12+12=0

We add all the numbers together, and all the variables

4X+24=0

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

4X=-24

X=-24/4

X=-6

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