12=-28-4x

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Solution for 12=-28-4x equation: 



12=-28-4x

We move all terms to the left:

12-(-28-4x)=0

We add all the numbers together, and all the variables

-(-4x-28)+12=0

We get rid of parentheses

4x+28+12=0

We add all the numbers together, and all the variables

4x+40=0

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

4x=-40

x=-40/4

x=-10

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