-1=2+3a

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Solution for -1=2+3a equation: 



-1=2+3a

We move all terms to the left:

-1-(2+3a)=0

We add all the numbers together, and all the variables

-(3a+2)-1=0

We get rid of parentheses

-3a-2-1=0

We add all the numbers together, and all the variables

-3a-3=0

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

-3a=3

a=3/-3

a=-1

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