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4r+12/8=3r-9/3
We move all terms to the left:
4r+12/8-(3r-9/3)=0
We add all the numbers together, and all the variables
4r-(3r-3)+12/8=0
We get rid of parentheses
4r-3r+3+12/8=0
We multiply all the terms by the denominator
4r*8-3r*8+12+3*8=0
We add all the numbers together, and all the variables
4r*8-3r*8+36=0
Wy multiply elements
32r-24r+36=0
We add all the numbers together, and all the variables
8r+36=0
We move all terms containing r to the left, all other terms to the right
8r=-36
r=-36/8
r=-4+1/2
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