2a+7-8a=-11

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Solution for 2a+7-8a=-11 equation: 



2a+7-8a=-11

We move all terms to the left:

2a+7-8a-(-11)=0

We add all the numbers together, and all the variables

-6a+18=0

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

-6a=-18

a=-18/-6

a=+3

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