12-3a-3a-3=9-5a

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Solution for 12-3a-3a-3=9-5a equation: 



12-3a-3a-3=9-5a

We move all terms to the left:

12-3a-3a-3-(9-5a)=0

We add all the numbers together, and all the variables

-3a-3a-(-5a+9)+12-3=0

We add all the numbers together, and all the variables

-6a-(-5a+9)+9=0

We get rid of parentheses

-6a+5a-9+9=0

We add all the numbers together, and all the variables

-a=0

a=0/-1

a=0

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