x - 19 = 9 * 9x - 19 = 81x = 81 + 19x = 100
(72 - 36) / x = 436 / x = 4x = 36 / 4x = 9
x * 6 = 81 - 276x = 54x = 54 / 6x = 9
Ответ: x = 100; x = 9; x = 9.
x - 19 = 9 * 9
x - 19 = 81
x = 81 + 19
x = 100
(72 - 36) / x = 4
36 / x = 4
x = 36 / 4
x = 9
x * 6 = 81 - 27
6x = 54
x = 54 / 6
x = 9
Ответ: x = 100; x = 9; x = 9.