9(a-3)=12a

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Solution for 9(a-3)=12a equation: 



9(a-3)=12a

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

-12a+9a-27=0

We add all the numbers together, and all the variables

-3a-27=0

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

-3a=27

a=27/-3

a=-9

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