1. ## logs.

logbase27x = 1 -logbase27 (x-0.4)

thanks.

2. Originally Posted by livelaughlove92

logbase27x = 1 -logbase27 (x-0.4)

thanks.
use the properties of log to simplify this term

$\log_{a} x +\log_{a} y = \log_{a} xy$ , and
if $x = a^z$ then $\log_{a} x = z$