5a + a = 606a = 60a = 60/6a = 10
Ответ: a = 10
7x - x + 2 = 106x + 2 = 106x = 8x = 8/6x = 4/3
Ответ: x = 4/3
5a + a = 60
6a = 60
a = 60/6
a = 10
Ответ: a = 10
7x - x + 2 = 10
6x + 2 = 10
6x = 8
x = 8/6
x = 4/3
Ответ: x = 4/3