-7-7r=8r

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



-7-7r=8r

We move all terms to the left:

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

We add all the numbers together, and all the variables

-15r-7=0

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

-15r=7

r=7/-15

r=-7/15

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