-12+15=-3(x+9)

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Solution for -12+15=-3(x+9) equation: 



-12+15=-3(x+9)

We move all terms to the left:

-12+15-(-3(x+9))=0

We add all the numbers together, and all the variables

-(-3(x+9))+3=0



We calculate terms in parentheses: -(-3(x+9)), so:

-3(x+9)

We multiply parentheses

-3x-27

Back to the equation:

-(-3x-27)



We get rid of parentheses

3x+27+3=0

We add all the numbers together, and all the variables

3x+30=0

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

3x=-30

x=-30/3

x=-10

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