5x+4x+12=-15

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



5x+4x+12=-15

We move all terms to the left:

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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