12+3x=3(-x+7)-39

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Solution for 12+3x=3(-x+7)-39 equation: 



12+3x=3(-x+7)-39

We move all terms to the left:

12+3x-(3(-x+7)-39)=0

We add all the numbers together, and all the variables

3x-(3(-1x+7)-39)+12=0



We calculate terms in parentheses: -(3(-1x+7)-39), so:

3(-1x+7)-39

We multiply parentheses

-3x+21-39

We add all the numbers together, and all the variables

-3x-18

Back to the equation:

-(-3x-18)



We get rid of parentheses

3x+3x+18+12=0

We add all the numbers together, and all the variables

6x+30=0

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

6x=-30

x=-30/6

x=-5

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