Ответ: x = 1; x = 5; a = 5; a = 2
Решение:
1) 6 ⋅ 4 = 6 ⋅ x + 12 : 2
24 = 6x + 6
6x = 24 - 6
6x = 18
x = 18 / 6
x = 3
2) 7 ⋅ 3 = 7 ⋅ x - 14 : 2
21 = 7x - 7
7x = 21 + 7
7x = 28
x = 28 / 7
x = 4
3) 5 ⋅ a = 5 ⋅ 2 + 5 ⋅ 3
5a = 10 + 15
5a = 25
a = 25 / 5
a = 5
4) 8 ⋅ a = 8 ⋅ 5 - 8 ⋅ 3
8a = 40 - 24
8a = 16
a = 16 / 8
a = 2
Ответ: x = 3; x = 4; a = 5; a = 2