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0.5r+2.75=3
We move all terms to the left:
0.5r+2.75-(3)=0
We add all the numbers together, and all the variables
0.5r-0.25=0
We move all terms containing r to the left, all other terms to the right
0.5r=0.25
r=0.25/0.5
r=0.25/0.5
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