-a-3=31

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Solution for -a-3=31 equation: 



-a-3=31

We move all terms to the left:

-a-3-(31)=0

We add all the numbers together, and all the variables

-1a-34=0

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

-a=34

a=34/-1

a=-34

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