Edit: I have figured out how to solve this problem
"An account with initial amount $B earns compound interest at an annual effective interest rate i. The interest in the third year is $426, and the discount in the seventh year is $812. Find i."
I know how to solve this problem with a graphing calculator or program that can solve variables, but I'm only allowed to use a regular calculator on the upcoming test. How can I set up the equations in this problem to solve for i in a minimal amount of time?
Thank you for trying to help, but what you posted is already familiar to me.
My problem is trying to set up a system of equations from which I can solve for i on paper (a numerical answer for i). I can't find a strategy to solve that works on paper without taking a very very long time.