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4r-5=2(2r-1)-3
We move all terms to the left:
4r-5-(2(2r-1)-3)=0
We calculate terms in parentheses: -(2(2r-1)-3), so:We get rid of parentheses
2(2r-1)-3
We multiply parentheses
4r-2-3
We add all the numbers together, and all the variables
4r-5
Back to the equation:
-(4r-5)
4r-4r+5-5=0
We add all the numbers together, and all the variables
=0
r=0/1
r=0
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