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4(r-5)-3(r-1)=2(r+4)
We move all terms to the left:
4(r-5)-3(r-1)-(2(r+4))=0
We multiply parentheses
4r-3r-(2(r+4))-20+3=0
We calculate terms in parentheses: -(2(r+4)), so:We add all the numbers together, and all the variables
2(r+4)
We multiply parentheses
2r+8
Back to the equation:
-(2r+8)
r-(2r+8)-17=0
We get rid of parentheses
r-2r-8-17=0
We add all the numbers together, and all the variables
-1r-25=0
We move all terms containing r to the left, all other terms to the right
-r=25
r=25/-1
r=-25
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