80=-3r-5r

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Solution for 80=-3r-5r equation: 



80=-3r-5r

We move all terms to the left:

80-(-3r-5r)=0

We add all the numbers together, and all the variables

-(-8r)+80=0

We get rid of parentheses

8r+80=0

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

8r=-80

r=-80/8

r=-10

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