a+31=2a

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Solution for a+31=2a equation: 



a+31=2a

We move all terms to the left:

a+31-(2a)=0

We add all the numbers together, and all the variables

-1a+31=0

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

-a=-31

a=-31/-1

a=+31

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