89х + 68 = 9057
89х = 9057 - 68
89х = 8989
х= 8989 : 89
х = 101
--------------------------------
89 * 101 + 68 = 9057
8989 + 68 = 9057
9057 = 9057
528 : х - 24 = 64
528 : х = 64 + 24
528 : х = 88
х = 528 : 88
х = 6
-------------------------
528 : 6 - 24 = 64
88 - 24 = 64
64 = 64