( (2 1/2) * (1 4/5) )/ (3/4) = (5/2 * 9/5) / (3/4) = (9/2) / (3/4) = 6кг
тут пропорция:
/ 1 = 2 / х
х= 2 * 1 / = 6
ответ: 6кг
( (2 1/2) * (1 4/5) )/ (3/4) = (5/2 * 9/5) / (3/4) = (9/2) / (3/4) = 6кг
тут пропорция:
/ 1 = 2 / х
х= 2 * 1 / = 6
ответ: 6кг