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5(r-3.8)=22
We move all terms to the left:
5(r-3.8)-(22)=0
We multiply parentheses
5r-19-22=0
We add all the numbers together, and all the variables
5r-41=0
We move all terms containing r to the left, all other terms to the right
5r=41
r=41/5
r=8+1/5
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