-8a-3+9a=21

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Solution for -8a-3+9a=21 equation: 



-8a-3+9a=21

We move all terms to the left:

-8a-3+9a-(21)=0

We add all the numbers together, and all the variables

a-24=0

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

a=24

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