-3a=9-2a

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Solution for -3a=9-2a equation: 



-3a=9-2a

We move all terms to the left:

-3a-(9-2a)=0

We add all the numbers together, and all the variables

-3a-(-2a+9)=0

We get rid of parentheses

-3a+2a-9=0

We add all the numbers together, and all the variables

-1a-9=0

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

-a=9

a=9/-1

a=-9

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