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5r/9-4=3
We move all terms to the left:
5r/9-4-(3)=0
We add all the numbers together, and all the variables
5r/9-7=0
We multiply all the terms by the denominator
5r-7*9=0
We add all the numbers together, and all the variables
5r-63=0
We move all terms containing r to the left, all other terms to the right
5r=63
r=63/5
r=12+3/5
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