8a-9a=11

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Solution for 8a-9a=11 equation: 



8a-9a=11

We move all terms to the left:

8a-9a-(11)=0

We add all the numbers together, and all the variables

-1a-11=0

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

-a=11

a=11/-1

a=-11

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