Voltage and current sources; circuit

[bakin]

Homework Statement

For the circuit, if V2=1000i2 and i2 = 5mA, determine Vs

Homework Equations

The Attempt at a Solution

I'm really stuck here for some reason and have no idea where to start. Any pointers?

KVL and KCL is in the next chapter, so I think I should be solving without those.

 

[Hootenanny]

I think Kirchoff's laws are the way to go here. Perhaps your teacher intended you to read ahead and attempt the problem yourself?