Kirchhoff's Current Law problem

[jgv115]

Homework Statement

The Attempt at a Solution

Currents entering the top node...

$\frac{V}{6000} - 0.01 - \frac{V}{9000} - \frac{V}{8000} + 0.009 - \frac{V}{3000} = 0$

Solve for V I get -2.48

The current Ia is the addition of the current going out of Rd add Is2

so... $I = \frac{2.48}{3000} =0.000823$ Therefore.. $I_{A} = 0.000823 - 0.009= -0.008172$ This is wrong... the answer is -9.45mA and I get -8.17mA

Anyone care to help me out!

 

[gneill]

Check the sign on the first term of your KCL equation...