21y-1=81

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Solution for 21y-1=81 equation: 



21y-1=81

We move all terms to the left:

21y-1-(81)=0

We add all the numbers together, and all the variables

21y-82=0

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

21y=82

y=82/21

y=3+19/21

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