do you have information on isolating variables.

Question

For example: rearrange formula to isolate i

PV=PMT/i 

Answer 1

     PV = PMT/i

The goal is to solve the formula for i, doing so by isolating it to one side of the equation.

The first step would be to cross multiply:

     PV/1 = PMT/i

     PV·i = 1·PMT

     PVi = PMT

Divide both sides of the equation by PV to solve for i:

     PVi/PV = PMT/PV

     ==> Looking at the left hand side, since there is a PV in both the numerator and the denominator they cancel each other out. The right hand side has a P in both the numerator and the denominator which also cancel each other out. This yields the following:

     PVi/PV = PMT/PV

     i = MT/V