You have typed in the following equation:

And selected to solve for 'x'.

The solving involves moving the variable 'x' on one side and all the other variables to the other side.

If you multiply by 'g/f' you will get the following solution:

If you are trying to type in a function f(x) you should know that general functional notation (e.g. f(x) ) is not supported. If you wish to draw a function such as f(x) = x^2, replace f(x) with y (or any other unused variable).