Hmm.. The solution is too long for me to write here, but let me express it. Let's call

Then the equation is,

What you must do here is to equalize the denominators by expanding all the fractions as they'll all have the denominator

And then you can discard the common denominator, make some factorizations, simplify it as much as you can. Then this will give you a fourth degree equation which can be expressed as a quadratic equation. This will give you and you can get to