SOLUTION: 5(r+4)=d 12(r-4)=d r is rate, and that is what I am trying to solve for.

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Question 930779: 5(r+4)=d
12(r-4)=d
r is rate, and that is what I am trying to solve for.
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
5(r+4)=d
12(r-4)=d


Therefore
5(r+4)=12(r-4)
5r+20=12r-48
7r=68
r=68/7