-7=(8+a)

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Solution for -7=(8+a) equation: 



-7=(8+a)

We move all terms to the left:

-7-((8+a))=0

We add all the numbers together, and all the variables

-((a+8))-7=0



We calculate terms in parentheses: -((a+8)), so:

(a+8)

We get rid of parentheses

a+8

Back to the equation:

-(a+8)



We get rid of parentheses

-a-8-7=0

We add all the numbers together, and all the variables

-1a-15=0

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

-a=15

a=15/-1

a=-15

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