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3r+18/12=5r-45/5
We move all terms to the left:
3r+18/12-(5r-45/5)=0
We add all the numbers together, and all the variables
3r-(5r-9)+18/12=0
We get rid of parentheses
3r-5r+9+18/12=0
We multiply all the terms by the denominator
3r*12-5r*12+18+9*12=0
We add all the numbers together, and all the variables
3r*12-5r*12+126=0
Wy multiply elements
36r-60r+126=0
We add all the numbers together, and all the variables
-24r+126=0
We move all terms containing r to the left, all other terms to the right
-24r=-126
r=-126/-24
r=5+1/4
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