36 * (5a + 19) = 30a + 1134
180a + 684 = 30a + 1134
180a - 30a = 1134 - 684
150a = 450
a = 450 : 150
a = 3
Проверка
36 * (5 * 3 + 19) = 30 * 3 + 1134
1224 = 1224
725t - 123t - 292 = 912
602t = 912 + 292
602t = 1204
t = 1204 : 602
t = 2
Проверка
725 * 2 - 123 * 2 - 292 = 912
912 = 912