: Find the current i in the circuit below using basic techniques such as KVL, KCL, and Ohm's law. Then let the voltage across the current-controlled voltage source be Ri_x (instead of 5i_x as labeled). Which (if any) values of R cause the solution to not exist? Finally, find i when R = 10 Ohm and explain the result. Find the current i_x in the circuit below using superposition.