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4(-5+7r)=(2r+6)
We move all terms to the left:
4(-5+7r)-((2r+6))=0
We add all the numbers together, and all the variables
4(7r-5)-((2r+6))=0
We multiply parentheses
28r-((2r+6))-20=0
We calculate terms in parentheses: -((2r+6)), so:We get rid of parentheses
(2r+6)
We get rid of parentheses
2r+6
Back to the equation:
-(2r+6)
28r-2r-6-20=0
We add all the numbers together, and all the variables
26r-26=0
We move all terms containing r to the left, all other terms to the right
26r=26
r=26/26
r=1
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