Question

Circuits:

Answer 1

I got the answer with KCL as -2.59 mA while the book answer is -3.41 mA

Answer 2

Post my solution ?

Answer 3

Req = 20/39 kohm

Ieq = 4 mA

V = 80/39 v

I1 = 3 + IA

80/ (39 * 5) = 3 + IA

Ia = -2.59 mA

if I put -80/(39 * 5)

I get the book answer, but I don't know what's wrong with the direction of I.

Answer 4

I still looking at this but I am very rusty.