X+4=-12-3x

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



X+4=-12-3X

We move all terms to the left:

X+4-(-12-3X)=0

We add all the numbers together, and all the variables

X-(-3X-12)+4=0

We get rid of parentheses

X+3X+12+4=0

We add all the numbers together, and all the variables

4X+16=0

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

4X=-16

X=-16/4

X=-4

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