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2=(r+9)/7
We move all terms to the left:
2-((r+9)/7)=0
We multiply all the terms by the denominator
-((r+9)+2*7)=0
We calculate terms in parentheses: -((r+9)+2*7), so:We get rid of parentheses
(r+9)+2*7
We add all the numbers together, and all the variables
(r+9)+14
We get rid of parentheses
r+9+14
We add all the numbers together, and all the variables
r+23
Back to the equation:
-(r+23)
-r-23=0
We add all the numbers together, and all the variables
-1r-23=0
We move all terms containing r to the left, all other terms to the right
-r=23
r=23/-1
r=-23
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