-7=-2(a+4)-7

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Solution for -7=-2(a+4)-7 equation: 



-7=-2(a+4)-7

We move all terms to the left:

-7-(-2(a+4)-7)=0



We calculate terms in parentheses: -(-2(a+4)-7), so:

-2(a+4)-7

We multiply parentheses

-2a-8-7

We add all the numbers together, and all the variables

-2a-15

Back to the equation:

-(-2a-15)



We get rid of parentheses

2a+15-7=0

We add all the numbers together, and all the variables

2a+8=0

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

2a=-8

a=-8/2

a=-4

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