12(1-a)=-5a-9

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Solution for 12(1-a)=-5a-9 equation: 



12(1-a)=-5a-9

We move all terms to the left:

12(1-a)-(-5a-9)=0

We add all the numbers together, and all the variables

12(-1a+1)-(-5a-9)=0

We multiply parentheses

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

We get rid of parentheses

-12a+5a+9+12=0

We add all the numbers together, and all the variables

-7a+21=0

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

-7a=-21

a=-21/-7

a=+3

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