-2a+9+8=-28

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Solution for -2a+9+8=-28 equation: 



-2a+9+8=-28

We move all terms to the left:

-2a+9+8-(-28)=0

We add all the numbers together, and all the variables

-2a+45=0

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

-2a=-45

a=-45/-2

a=22+1/2

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