-15=(7+2x)3

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Solution for -15=(7+2x)3 equation: 



-15=(7+2x)3

We move all terms to the left:

-15-((7+2x)3)=0

We add all the numbers together, and all the variables

-((2x+7)3)-15=0



We calculate terms in parentheses: -((2x+7)3), so:

(2x+7)3

We multiply parentheses

6x+21

Back to the equation:

-(6x+21)



We get rid of parentheses

-6x-21-15=0

We add all the numbers together, and all the variables

-6x-36=0

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

-6x=36

x=36/-6

x=-6

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