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2r+4/4=5r-15/5
We move all terms to the left:
2r+4/4-(5r-15/5)=0
We add all the numbers together, and all the variables
2r-(5r-3)+4/4=0
We add all the numbers together, and all the variables
2r-(5r-3)+1=0
We get rid of parentheses
2r-5r+3+1=0
We add all the numbers together, and all the variables
-3r+4=0
We move all terms containing r to the left, all other terms to the right
-3r=-4
r=-4/-3
r=1+1/3
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