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r+8/4=2/7
We move all terms to the left:
r+8/4-(2/7)=0
We add all the numbers together, and all the variables
r+8/4-(+2/7)=0
We add all the numbers together, and all the variables
r+2-(+2/7)=0
We get rid of parentheses
r+2-2/7=0
We multiply all the terms by the denominator
r*7-2+2*7=0
We add all the numbers together, and all the variables
r*7+12=0
Wy multiply elements
7r+12=0
We move all terms containing r to the left, all other terms to the right
7r=-12
r=-12/7
r=-1+5/7
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