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r-(5-r)=13+2r
We move all terms to the left:
r-(5-r)-(13+2r)=0
We add all the numbers together, and all the variables
r-(-1r+5)-(2r+13)=0
We get rid of parentheses
r+1r-2r-5-13=0
We add all the numbers together, and all the variables
-18!=0
There is no solution for this equation
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