-15=5(x+3)

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Solution for -15=5(x+3) equation: 



-15=5(x+3)

We move all terms to the left:

-15-(5(x+3))=0



We calculate terms in parentheses: -(5(x+3)), so:

5(x+3)

We multiply parentheses

5x+15

Back to the equation:

-(5x+15)



We get rid of parentheses

-5x-15-15=0

We add all the numbers together, and all the variables

-5x-30=0

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

-5x=30

x=30/-5

x=-6

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