15=3(-x-4)

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Solution for 15=3(-x-4) equation: 



15=3(-x-4)

We move all terms to the left:

15-(3(-x-4))=0

We add all the numbers together, and all the variables

-(3(-1x-4))+15=0



We calculate terms in parentheses: -(3(-1x-4)), so:

3(-1x-4)

We multiply parentheses

-3x-12

Back to the equation:

-(-3x-12)



We get rid of parentheses

3x+12+15=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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