How to solve equations with variable in denominator?

In general you can multiply through by the LCD

For example solve : -

2/x + 1 / (1 + x) = 11/12

The LCD is 12x (x + 1).

Now we multiply each term by 12x (x + 1)

2*12 (x+1) + 12x = 11x (x + 1)

and this is solved in the usual way.