12007мм
503026г
4848мин
40 мин 15сек
56+у=65+35
у=65+35-56
у=100-56
у=44
Ответ: 44
(3 1/2 : 4 2/3 + 4 2/3 : 3 1/2) * 4 4/5 = 10,
1) 3 1/2 : 4 2/3 = 7/2 : 14/3 = 7/2 * 3/14 = 3/4,
2) 4 2/3 : 3 1/2 = 14/3 : 7/2 = 14/3 * 2/7 = 4/3 = 1 1/3,
3) 3/4 + 1 1/3 = 3/4 + 4/3 = 9/12 + 16/12 = 25/12 = 2 1/12,
4) 2 1/12 * 4 4/5 = 25/12 * 24/5 = 2 * 5 = 10
8,3х+15х=95,3-12
23,3х=83,3
х=3,57