# Thread: Transpose equation to find for x as power

1. ## Transpose equation to find for x as power

Hi guys,

I've been using an equation to calculate the cost capacity given a index factor "x"

now i want to use this to calculate an index factor "x" given some past data.

The equation is:

c2 = c1 * (q2 / q1) ^ x

i would like to use this to find x given i know all other variables but my ability to transpose this equation is limited.

thanks for help.

2. ## Re: Transpose equation to find for x as power

$x=\dfrac{\log(c_2)-\log(c_1)}{\log(q_2)-\log(q_1)}$