2646 : в = 98
98в = 2646
в = 27
Проверка:
2646 : 27 = 98
98 = 98
----------------------------------
26к - 37 = 457
26к = 457 + 37
26к = 494
к = 19
Проверка:
26 * 19 - 37 = 457
494 - 37 = 457
457 = 457
-----------------------------
1800 - 17х = 1562
17х = 1800 - 1562
17х = 238
х = 14
Проверка:
1800 - 17*14 = 1562
1800 - 238 = 1562
1562 = 1562