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7(3r+11)+4r+5/2=21/2
We move all terms to the left:
7(3r+11)+4r+5/2-(21/2)=0
We add all the numbers together, and all the variables
7(3r+11)+4r+5/2-(+21/2)=0
We add all the numbers together, and all the variables
4r+7(3r+11)+5/2-(+21/2)=0
We multiply parentheses
4r+21r+77+5/2-(+21/2)=0
We get rid of parentheses
4r+21r+77+5/2-21/2=0
We multiply all the terms by the denominator
4r*2+21r*2+5-21+77*2=0
We add all the numbers together, and all the variables
4r*2+21r*2+138=0
Wy multiply elements
8r+42r+138=0
We add all the numbers together, and all the variables
50r+138=0
We move all terms containing r to the left, all other terms to the right
50r=-138
r=-138/50
r=-2+19/25
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