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0.5(r+2.75)=3
We move all terms to the left:
0.5(r+2.75)-(3)=0
We multiply parentheses
0.5r+1.375-3=0
We add all the numbers together, and all the variables
0.5r-1.625=0
We move all terms containing r to the left, all other terms to the right
0.5r=1.625
r=1.625/0.5
r=3+0.125/0.5
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