Equations can be solved in different ways.
Might I suggest solving for r. Which gives you r = (P - n)/e. But the real insight is think real, real hard about the one way to get the value of r in that equation to be 0. I think there is just one way. Once that is solved, then the remaining variables in the equation are easy to fill in.
jim
Originally Posted by
Poguemahone
I hate to quote myself, but I also hate to type. I have given careful scientific investigation to the n+1 theory, and found it lacking, and have replaced it thus:
I accept donations to further my research. Interestingly, like many great scientists, I use myself as a subject in my investigations. I bought a bike last night. I rated it a six, and figured I could bear Amy's undying love for Michael Bolton....
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