r/81=4

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Solution for r/81=4 equation: 



r/81=4

We move all terms to the left:

r/81-(4)=0

We multiply all the terms by the denominator


r-4*81=0

We add all the numbers together, and all the variables

r-324=0

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

r=324

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