9a-8=81

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Solution for 9a-8=81 equation: 



9a-8=81

We move all terms to the left:

9a-8-(81)=0

We add all the numbers together, and all the variables

9a-89=0

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

9a=89

a=89/9

a=9+8/9

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