The 2 Ω and X Ω resistors are in parallel, and their effective resistance is 1.2 Ω \(\frac{1}{R_{eff}}\) = \(\frac{1}{R_1}\) + \(\frac{1}{\text{X}}\) \(\frac{1}{1.2}\) = \(\frac{1}{2}\) + \(\frac{1}{\text{X}}\) \(\frac{1}{\text{X}}\) = \(\frac{5}{6}\) - \(\frac{1}{2}\) = \(\frac{5 - 3}{6}\) \(\frac{1}{\text{X}}\) = \(\frac{2}{6}\) = \(\frac{1}{3}\) Cross multiply X = 3 Ω