Multiply through by x and rearrange to give
x^2 - 29x/10 +1 = 0
use the quadratic formula to get x = [2.9 +/- Sqrt(4.41)] / 2
therefore x= 2.5 or x = 0.4
* it seems i've interpreted the question differently to those above. I've read it as x +(1/x) = 29/10