1) x = 10. Пров.: 10 * 7 =70. 70 * 2 = 140
2) x = 400. Пров.: 400 : 4 = 100. 100- 16 = 84
3) x = 3 . Пров.: 3 * 4 = 12
1) x = 10. Пров.: 10 * 7 =70. 70 * 2 = 140
2) x = 400. Пров.: 400 : 4 = 100. 100- 16 = 84
3) x = 3 . Пров.: 3 * 4 = 12