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8.75+8.65r=9.10
We move all terms to the left:
8.75+8.65r-(9.10)=0
We add all the numbers together, and all the variables
8.65r+8.75-(9.1)=0
We add all the numbers together, and all the variables
8.65r-0.35=0
We move all terms containing r to the left, all other terms to the right
8.65r=0.35
r=0.35/8.65
r=0.35/8.65
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