How to calculate current going through an LED
For the future (I doubt you need it now), I'll describe a more sophisticated approach that combines the Thevenin source with graphical (rather than using an equation) consideration of the nonlinear behavior of the LED. 


Find the Thevenin equivalent as Martin suggests. You will find an equivalent voltage and an equivalent resistance. In this case it's 2.14V and 42.86\$\Omega\$. 
Take a copy of the LED datasheet where it shows the Forward Current vs. Forward Bias. For example, the below, from this datasheet. 




The lowest voltage shown on the left side is 1.2V. The current from our Thevenin source would be (2.14V-1.2V)/42.86\$\Omega\$ = 21.93mA. Mark that on the axis. Now draw a diagonal line from that point to the Thevenin equivalent voltage. This is called a load line. Where it crosses the LED curve tells you the LED current and votlage when it it connected to the source- as so:

 

What if they don't cross (or only appear to cross very close to 0mA)? Then the LED will not light. Try this with a blue LED characteristic curve and you'll see that it won't light. This should make sense to you, since you know from the Thevenin calculation that when the LED is removed (the highest voltage you'll see) the voltage will be only 2.14V (and that's not enough to light a blue LED). 

And if the line is off the top, that probably means your LED will fry. 

This is the old-school way of finding the operating point when have (a) nonlinear element(s). In 2014 most folks would probably fire up a simulator, which is good when it produces correct results (but they're only as correct as the models accurately reflect reality and as well as the the simulation is set up).