a) 25x + 9x = 1394
34x = 1394
$$x = \frac{1394}{34} = 41$$
б) 30y - 2y = 532
28y = 532
$$y = \frac{532}{28} = 19$$
в) 9a - a + 14 = 94
8a + 14 = 94
8a = 94 - 14
8a = 80
$$a = \frac{80}{8} = 10$$
г) m + 6m - 5 = 72
7m - 5 = 72
7m = 72 + 5
7m = 77
$$m = \frac{77}{7} = 11$$
Ответ: а) x = 41; б) y = 19; в) a = 10; г) m = 11.