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22=8r-2
We move all terms to the left:
22-(8r-2)=0
We get rid of parentheses
-8r+2+22=0
We add all the numbers together, and all the variables
-8r+24=0
We move all terms containing r to the left, all other terms to the right
-8r=-24
r=-24/-8
r=+3
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