r-7-8r=14

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Solution for r-7-8r=14 equation: 



r-7-8r=14

We move all terms to the left:

r-7-8r-(14)=0

We add all the numbers together, and all the variables

-7r-21=0

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

-7r=21

r=21/-7

r=-3

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