64 - x = 464 - 4 = xx = 60
x + 8 = 28x = 28 - 8x = 20
x - 9 = 17x = 17 + 9x = 26
Ответ: x = 60, x = 20, x = 26
64 - x = 4
64 - 4 = x
x = 60
x + 8 = 28
x = 28 - 8
x = 20
x - 9 = 17
x = 17 + 9
x = 26
Ответ: x = 60, x = 20, x = 26