Calculate the current i3 in the following configuration

[shimizua]

Homework Statement

Calculate the current i3 in the following configuration:


http://capa-new.colorado.edu/msuphysicslib/Graphics/Gtype57/prob06_kirch.gif
EMF_1 = 6 V
EMF_2 = 3 V
R_1 = 70 Ohm
R_3 = 20 Ohm

Homework Equations

I know that V=IR so I=V/R
but because there are 2 batteries i am just having a little bit of a problem.

The Attempt at a Solution

tried adding up the batteries but it does not seem to be working

 

[shimizua]

nm, i figured it out