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17=-13-8r
We move all terms to the left:
17-(-13-8r)=0
We add all the numbers together, and all the variables
-(-8r-13)+17=0
We get rid of parentheses
8r+13+17=0
We add all the numbers together, and all the variables
8r+30=0
We move all terms containing r to the left, all other terms to the right
8r=-30
r=-30/8
r=-3+3/4
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