3a-9=6a+6

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Solution for 3a-9=6a+6 equation: 



3a-9=6a+6

We move all terms to the left:

3a-9-(6a+6)=0

We get rid of parentheses

3a-6a-6-9=0

We add all the numbers together, and all the variables

-3a-15=0

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

-3a=15

a=15/-3

a=-5

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