1) x - 6 = 9x = 9 + 6x = 15
2) x + 2 = 42x = 42 - 2x = 40
3) 23 - x = 3-x = 3 - 23-x = -20x = 20
Ответ: x = 15, x = 40, x = 20
1) x - 6 = 9
x = 9 + 6
x = 15
2) x + 2 = 42
x = 42 - 2
x = 40
3) 23 - x = 3
-x = 3 - 23
-x = -20
x = 20
Ответ: x = 15, x = 40, x = 20