3a-9=9a

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Solution for 3a-9=9a equation: 



3a-9=9a

We move all terms to the left:

3a-9-(9a)=0

We add all the numbers together, and all the variables

-6a-9=0

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

-6a=9

a=9/-6

a=-1+1/2

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