21-3(2-x)=-12

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Solution for 21-3(2-x)=-12 equation: 



21-3(2-x)=-12

We move all terms to the left:

21-3(2-x)-(-12)=0

We add all the numbers together, and all the variables

-3(-1x+2)+21-(-12)=0

We add all the numbers together, and all the variables

-3(-1x+2)+33=0

We multiply parentheses

3x-6+33=0

We add all the numbers together, and all the variables

3x+27=0

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

3x=-27

x=-27/3

x=-9

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