4a-12=-20a

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Solution for 4a-12=-20a equation: 



4a-12=-20a

We move all terms to the left:

4a-12-(-20a)=0

We get rid of parentheses

4a+20a-12=0

We add all the numbers together, and all the variables

24a-12=0

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

24a=12

a=12/24

a=1/2

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