-15+21=-2(x+7)

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Solution for -15+21=-2(x+7) equation: 



-15+21=-2(x+7)

We move all terms to the left:

-15+21-(-2(x+7))=0

We add all the numbers together, and all the variables

-(-2(x+7))+6=0



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

-2(x+7)

We multiply parentheses

-2x-14

Back to the equation:

-(-2x-14)



We get rid of parentheses

2x+14+6=0

We add all the numbers together, and all the variables

2x+20=0

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

2x=-20

x=-20/2

x=-10

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