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-(2r+5)=8-2r
We move all terms to the left:
-(2r+5)-(8-2r)=0
We add all the numbers together, and all the variables
-(2r+5)-(-2r+8)=0
We get rid of parentheses
-2r+2r-5-8=0
We add all the numbers together, and all the variables
-13!=0
There is no solution for this equation
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