15-27=-2a-2a

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Solution for 15-27=-2a-2a equation: 



15-27=-2a-2a

We move all terms to the left:

15-27-(-2a-2a)=0

We add all the numbers together, and all the variables

-(-4a)+15-27=0

We add all the numbers together, and all the variables

-(-4a)-12=0

We get rid of parentheses

4a-12=0

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

4a=12

a=12/4

a=3

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