У=234-220
у=14
72:b=19-13
72:b=6
b=72:6
b=12
Я не знаю!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
P = (10 + 3)/(10 + 7 + 5 + 3) = 13/25 = 0,52
Ответ: 0,52 или 52%
2 3/5 - 1 4/5 = 1 8/5 - 1 4/5 = 4/5
3 * 4 * 5 = 60
(60 - 3) / 3 = 19
(60 - 4) / 4 = 14
(60 - 5) / 5 = 11