12-3x=15-4x

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



12-3x=15-4x

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

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

We add all the numbers together, and all the variables

x-3=0

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

x=3

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