1) x + 7 = 45x = 45 - 7x = 38
2) x - 7 = 38x = 38 + 7x = 45
3) 45 - x = 745 - 7 = xx = 38
Ответ: x = 38
1) x + 7 = 45
x = 45 - 7
x = 38
2) x - 7 = 38
x = 38 + 7
x = 45
3) 45 - x = 7
45 - 7 = x
x = 38
Ответ: x = 38