-2a+6-7a=-31

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Solution for -2a+6-7a=-31 equation: 



-2a+6-7a=-31

We move all terms to the left:

-2a+6-7a-(-31)=0

We add all the numbers together, and all the variables

-9a+37=0

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

-9a=-37

a=-37/-9

a=4+1/9

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