-27=3+a+2a

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Solution for -27=3+a+2a equation: 



-27=3+a+2a

We move all terms to the left:

-27-(3+a+2a)=0

We add all the numbers together, and all the variables

-(3a+3)-27=0

We get rid of parentheses

-3a-3-27=0

We add all the numbers together, and all the variables

-3a-30=0

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

-3a=30

a=30/-3

a=-10

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