4x+12=x-15

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



4x+12=x-15

We move all terms to the left:

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

We get rid of parentheses

4x-x+15+12=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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