300x - 72 = 7(96 + 108)300x - 72 = 7(204)300x - 72 = 1428300x = 1428 + 72300x = 1500x = 1500 / 300x = 5
Ответ: x = 5.
300x - 72 = 7(96 + 108)
300x - 72 = 7(204)
300x - 72 = 1428
300x = 1428 + 72
300x = 1500
x = 1500 / 300
x = 5
Ответ: x = 5.