-12-x=-15-4x

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



-12-x=-15-4x

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

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

We add all the numbers together, and all the variables

3x+3=0

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

3x=-3

x=-3/3

x=-1

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