1-5a=81

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Solution for 1-5a=81 equation: 



1-5a=81

We move all terms to the left:

1-5a-(81)=0

We add all the numbers together, and all the variables

-5a-80=0

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

-5a=80

a=80/-5

a=-16

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