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-49-5r=-8r-16
We move all terms to the left:
-49-5r-(-8r-16)=0
We get rid of parentheses
-5r+8r+16-49=0
We add all the numbers together, and all the variables
3r-33=0
We move all terms containing r to the left, all other terms to the right
3r=33
r=33/3
r=11
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