Solving Circuit Analysis with Nodal Analysis - Help Needed!

[mralam]

Hey guys. I have attached a circuit that i am trying to analyse using nodal analysis.
This is how i am doing it:

at node 2:
(v2-v1)/1 + v2/4 + (v2-v3)/1 = 0

at node 3:

(v3-v2)/1 + v3/2 = 4A

at node 1:

v1/25 = 2A

but i am not getting the right results for v1, v2 and v3.

Can anyone point out what i am doing wrong?

thanks

 

[waht]

Looks like you are given conductance of the resistors rather the resistance in ohms.

 

[mralam]

i have asked about that and it is suppose to be ohm not s

 

[eetwonder]

If your node 3 is at v_3, then where 3i_0 is in the equation?For the node 3, I would write the equation like 3i_0+4A=(v_3-v_2/1s)+v_3/2s. I think you may have missed the 3i_0 in your equation.