x+4=-3x-8

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Solution for x+4=-3x-8 equation: 



x+4=-3x-8

We move all terms to the left:

x+4-(-3x-8)=0

We get rid of parentheses

x+3x+8+4=0

We add all the numbers together, and all the variables

4x+12=0

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

4x=-12

x=-12/4

x=-3

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