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(8r-6)+(7r+3)=360
We move all terms to the left:
(8r-6)+(7r+3)-(360)=0
We get rid of parentheses
8r+7r-6+3-360=0
We add all the numbers together, and all the variables
15r-363=0
We move all terms containing r to the left, all other terms to the right
15r=363
r=363/15
r=24+1/5
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