5x+15=-12-4x

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Solution for 5x+15=-12-4x equation: 



5x+15=-12-4x

We move all terms to the left:

5x+15-(-12-4x)=0

We add all the numbers together, and all the variables

5x-(-4x-12)+15=0

We get rid of parentheses

5x+4x+12+15=0

We add all the numbers together, and all the variables

9x+27=0

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

9x=-27

x=-27/9

x=-3

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