a) n = 24a + 17 n - 17 = 24a 24 | (n-17)
n = 48b + 17 n-17 = 48b 48 | (n-17)
n = 40c + 17 n - 17 = 40c 40 | (n-17)
[24,48,40] = 240 n - 17 = 240 n = 257
b) n = 12a + 3 n - 3 = 12a 12 | (n-3)
n = 15b + 3 n - 3 = 15b 15 | (n - 3)
n = 27c + 3 n - 3 = 27c 27 | (n - 3)
[12,15,27] = 540 n - 3 = 540 n = 543
c) n - 6 = 14a 14 | (n - 6)
n - 6 = 21b 21 | (n-6)
n - 6 = 35c 35 | (n-6)
[14,21,35] = 210 n - 6 = 210 n = 216