-9=6-(7-a)

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Solution for -9=6-(7-a) equation: 



-9=6-(7-a)

We move all terms to the left:

-9-(6-(7-a))=0

We add all the numbers together, and all the variables

-(6-(-1a+7))-9=0



We calculate terms in parentheses: -(6-(-1a+7)), so:

6-(-1a+7)

determiningTheFunctionDomain
-(-1a+7)+6

We get rid of parentheses

1a-7+6

We add all the numbers together, and all the variables

a-1

Back to the equation:

-(a-1)



We get rid of parentheses

-a+1-9=0

We add all the numbers together, and all the variables

-1a-8=0

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

-a=8

a=8/-1

a=-8

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