4x+12-1x=-15

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Solution for 4x+12-1x=-15 equation: 



4x+12-1x=-15

We move all terms to the left:

4x+12-1x-(-15)=0

We add all the numbers together, and all the variables

3x+27=0

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

3x=-27

x=-27/3

x=-9

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