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5r+10=1-2(-4r+9)
We move all terms to the left:
5r+10-(1-2(-4r+9))=0
We calculate terms in parentheses: -(1-2(-4r+9)), so:We get rid of parentheses
1-2(-4r+9)
determiningTheFunctionDomain -2(-4r+9)+1
We multiply parentheses
8r-18+1
We add all the numbers together, and all the variables
8r-17
Back to the equation:
-(8r-17)
5r-8r+17+10=0
We add all the numbers together, and all the variables
-3r+27=0
We move all terms containing r to the left, all other terms to the right
-3r=-27
r=-27/-3
r=+9
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