3x-12=4x+15

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Solution for 3x-12=4x+15 equation: 



3x-12=4x+15

We move all terms to the left:

3x-12-(4x+15)=0

We get rid of parentheses

3x-4x-15-12=0

We add all the numbers together, and all the variables

-1x-27=0

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

-x=27

x=27/-1

x=-27

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