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5=r/4-2
We move all terms to the left:
5-(r/4-2)=0
We get rid of parentheses
-r/4+2+5=0
We multiply all the terms by the denominator
-r+2*4+5*4=0
We add all the numbers together, and all the variables
-1r+28=0
We move all terms containing r to the left, all other terms to the right
-r=-28
r=-28/-1
r=+28
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