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4r-11=4(5+r)=31
We move all terms to the left:
4r-11-(4(5+r))=0
We add all the numbers together, and all the variables
4r-(4(r+5))-11=0
We calculate terms in parentheses: -(4(r+5)), so:We get rid of parentheses
4(r+5)
We multiply parentheses
4r+20
Back to the equation:
-(4r+20)
4r-4r-20-11=0
We add all the numbers together, and all the variables
-31!=0
There is no solution for this equation
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