-x-12=3+2x

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Solution for -x-12=3+2x equation: 



-x-12=3+2x

We move all terms to the left:

-x-12-(3+2x)=0

We add all the numbers together, and all the variables

-x-(2x+3)-12=0

We add all the numbers together, and all the variables

-1x-(2x+3)-12=0

We get rid of parentheses

-1x-2x-3-12=0

We add all the numbers together, and all the variables

-3x-15=0

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

-3x=15

x=15/-3

x=-5

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