9a-9=3+a

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Solution for 9a-9=3+a equation: 



9a-9=3+a

We move all terms to the left:

9a-9-(3+a)=0

We add all the numbers together, and all the variables

9a-(a+3)-9=0

We get rid of parentheses

9a-a-3-9=0

We add all the numbers together, and all the variables

8a-12=0

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

8a=12

a=12/8

a=1+1/2

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