13+2a=39

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Solution for 13+2a=39 equation: 



13+2a=39

We move all terms to the left:

13+2a-(39)=0

We add all the numbers together, and all the variables

2a-26=0

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

2a=26

a=26/2

a=13

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