How would you go about finding X?

4^x - 4^(x-1) = 24

Edit: Bleh.

4^x - 4^x / 4 = 24
4 * 4^x - 4^x = 24 * 4
4^x(4-1) = 24 * 4
4^x(3) = 24 * 4
4^x = (24 * 4) / 3 = 8 * 4
4^x = 32
2^2x = 2^5
2x = 5
x = 2.5

Last edited by Defiance (2009-03-20 15:38:04)