-4a+20=8a+3a-9a

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Solution for -4a+20=8a+3a-9a equation: 



-4a+20=8a+3a-9a

We move all terms to the left:

-4a+20-(8a+3a-9a)=0

We add all the numbers together, and all the variables

-4a-(+2a)+20=0

We get rid of parentheses

-4a-2a+20=0

We add all the numbers together, and all the variables

-6a+20=0

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

-6a=-20

a=-20/-6

a=3+1/3

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