a-6=9-(9+a)

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



a-6=9-(9+a)

We move all terms to the left:

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

We add all the numbers together, and all the variables

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



We calculate terms in parentheses: -(9-(a+9)), so:

9-(a+9)

determiningTheFunctionDomain
-(a+9)+9

We get rid of parentheses

-a-9+9

We add all the numbers together, and all the variables

-a

Back to the equation:

-(-a)



We add all the numbers together, and all the variables

a-(-1a)-6=0

We get rid of parentheses

a+1a-6=0

We add all the numbers together, and all the variables

2a-6=0

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

2a=6

a=6/2

a=3

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