Kuddle Cuddle asked 12/4/2011 Solve using two different methods. Explain which method you found to be more efficient. A.3x - 9y = 3 6x - 3y = -24 b.7x - 3y = 20 5x + 3y = 16 c.y = (1/2)x - 6 2x + 6y = 19 (i dont know what methods to use)?