r/21=15/21

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Solution for r/21=15/21 equation:



r/21=15/21
We move all terms to the left:
r/21-(15/21)=0
We add all the numbers together, and all the variables
r/21-(+15/21)=0
We get rid of parentheses
r/21-15/21=0
We multiply all the terms by the denominator
r-15=0
We move all terms containing r to the left, all other terms to the right
r=15

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