[latex]2+ \frac{15}{x} = x[/latex]

[latex]2x+15=x^2 \\ x^2-2x-15=0 \\ D=4+60=64=8^2 \\ x= \frac{2+-8}{2} = \left \{ {{x_1=-3} \atop {x_2=5}} \right. [/latex]