5) 3 1/8 : (x - 4 7/24) = 17/18 + 1 5/6;

3 1/8 : (x - 4 7/24) = 25/8 : (x - 103/24) = 17/18 + 1 5/6 = 17/18 + 11/6 = (17 + 33)/18 = 50/18 = 25/9. Therefore, x - 103/24 = (25/8) * (9/25) = 9/8, x = 9/8 + 103/24 = (27 + 103)/24 = 130/24 = 65/12.