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1.5r-10=2.5
We move all terms to the left:
1.5r-10-(2.5)=0
We add all the numbers together, and all the variables
1.5r-12.5=0
We move all terms containing r to the left, all other terms to the right
1.5r=12.5
r=12.5/1.5
r=8+0.5/1.5
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