31=-28+15-22a

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Solution for 31=-28+15-22a equation: 



31=-28+15-22a

We move all terms to the left:

31-(-28+15-22a)=0

We add all the numbers together, and all the variables

-(-22a-13)+31=0

We get rid of parentheses

22a+13+31=0

We add all the numbers together, and all the variables

22a+44=0

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

22a=-44

a=-44/22

a=-2

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