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-r+5(r-3)=4r-23
We move all terms to the left:
-r+5(r-3)-(4r-23)=0
We add all the numbers together, and all the variables
-1r+5(r-3)-(4r-23)=0
We multiply parentheses
-1r+5r-(4r-23)-15=0
We get rid of parentheses
-1r+5r-4r+23-15=0
We add all the numbers together, and all the variables
8!=0
There is no solution for this equation
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