I am stuck at the last line of this problem. The original formula is

R=Rf+B(Rm-Rf)

I have moved it and placed the known information in

14=Rf+1.45(11.5-Rf)

Then moved it further

14=Rf+16.68-1.45Rf

I need to solve for Rf, but I am having a hard time remembering where to start at!! Thanks for your help!

1 answer

14-16.68=-.45Rf

Rf=2.68/.45

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