1)4ax = 844a(-3) = 84-12a = 84a = -7
2)(a-7)x = 6 + 5a(-7-7)(1) = 6 + 5(-7)-14 = 6 - 35-14 = -29a = Нет решения
1)
4ax = 84
4a(-3) = 84
-12a = 84
a = -7
2)
(a-7)x = 6 + 5a
(-7-7)(1) = 6 + 5(-7)
-14 = 6 - 35
-14 = -29
a = Нет решения