The two 3Ω resistors on the top sides are in series, giving a total of 6Ω. This 6Ω combination is in parallel with the bottom 3Ω resistor. The equivalent resistance R_eq = (6 * 3) / (6 + 3) = 18/9 = 2Ω. Current i = V/R_eq = 2V / 2Ω = 1 A.