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16-r/7=22
We move all terms to the left:
16-r/7-(22)=0
We add all the numbers together, and all the variables
-r/7-6=0
We multiply all the terms by the denominator
-r-6*7=0
We add all the numbers together, and all the variables
-1r-42=0
We move all terms containing r to the left, all other terms to the right
-r=42
r=42/-1
r=-42
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