Solving Circuit: Current in Each Resistor

[fball558]

Circut help!

Homework Statement

In the circuit shown below, the batteries have negligible internal resistance.

(a) Find the magnitude of the current in each resistor.

I3 = ?? A

I4 = ?? A

I6 = ?? A

Homework Equations

V=IR


i don't know where to begin because there are two batteries??
any help would be great

 

[lewando]

Hint: 2 batteries, but one voltage. Can you find a simpler equivalent circuit (from the resistors' point of view) based on this observation?