15=-3(2x+4)-3

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Solution for 15=-3(2x+4)-3 equation: 



15=-3(2x+4)-3

We move all terms to the left:

15-(-3(2x+4)-3)=0



We calculate terms in parentheses: -(-3(2x+4)-3), so:

-3(2x+4)-3

We multiply parentheses

-6x-12-3

We add all the numbers together, and all the variables

-6x-15

Back to the equation:

-(-6x-15)



We get rid of parentheses

6x+15+15=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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