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5(r-3)=8
We move all terms to the left:
5(r-3)-(8)=0
We multiply parentheses
5r-15-8=0
We add all the numbers together, and all the variables
5r-23=0
We move all terms containing r to the left, all other terms to the right
5r=23
r=23/5
r=4+3/5
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