12-4(a+2)=9a

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Solution for 12-4(a+2)=9a equation: 



12-4(a+2)=9a

We move all terms to the left:

12-4(a+2)-(9a)=0

We add all the numbers together, and all the variables

-9a-4(a+2)+12=0

We multiply parentheses

-9a-4a-8+12=0

We add all the numbers together, and all the variables

-13a+4=0

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

-13a=-4

a=-4/-13

a=4/13

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