There is no good way to solve this. It involves
solving a 4th degree (quartic) equation.
I'll use a TI-84 calculator, use the graphing feature
to get the decimal approximations for the least two
positive solutions:
3.679146, 5.507816
and add to each for the general solution
and
One of the other tutors may find a way to avoid a
4th degree equation, but I doubt it.
Edwin