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49=7r+1
We move all terms to the left:
49-(7r+1)=0
We get rid of parentheses
-7r-1+49=0
We add all the numbers together, and all the variables
-7r+48=0
We move all terms containing r to the left, all other terms to the right
-7r=-48
r=-48/-7
r=6+6/7
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