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(7r+1)/5=10
We move all terms to the left:
(7r+1)/5-(10)=0
We multiply all the terms by the denominator
(7r+1)-10*5=0
We add all the numbers together, and all the variables
(7r+1)-50=0
We get rid of parentheses
7r+1-50=0
We add all the numbers together, and all the variables
7r-49=0
We move all terms containing r to the left, all other terms to the right
7r=49
r=49/7
r=7
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