Ксения7 лет назад
Найдем x:
a) x/18 = 2/3.
x = 2/3 * 18 = (2 * 6 * 3) / 3 = 2 * 6 = 12.
b) 15/x = 3/4.
3x = 15 * 4.
x = (15 * 4) / 3 = (3 * 5 * 4) / 3 = 5 * 4 = 20.
c) 1 = x/337.
x = 337 * 1 = 337.
d) 33/x = 3.
x = 33 / 3 = 11.
Ответ: a) x = 12. b) x = 20. c) x = 337. d) x = 11.