2a+9=31

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Solution for 2a+9=31 equation: 



2a+9=31

We move all terms to the left:

2a+9-(31)=0

We add all the numbers together, and all the variables

2a-22=0

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

2a=22

a=22/2

a=11

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