12=-2x-3-x

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



12=-2x-3-x

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

3x+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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