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-11=-13-14r
We move all terms to the left:
-11-(-13-14r)=0
We add all the numbers together, and all the variables
-(-14r-13)-11=0
We get rid of parentheses
14r+13-11=0
We add all the numbers together, and all the variables
14r+2=0
We move all terms containing r to the left, all other terms to the right
14r=-2
r=-2/14
r=-1/7
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