Найдите 1/19ху из выражения 2/15:1 7/12 • 1/у • 13/48 = 3,25 • 3 1/3

П1) (2 13/48 + 2 5/12) : 3 3/4 - 9 3/4 : 12=4 33/48 * 4/15 - 39/4 * 1/12=

4 33/48 * 4/15 - 39/4 * 1/12=4 11/16 * 4/15 - 3/16=76/16 * 4/15 - 3/16=5/4 - 3/16=

(20-3)/16=17/16=1 1/16

2) (8 : 2 10/19 - 1 13/15 * 1 6/49) : (3 1/12 - 1 25/36)=(8/1 *19/48 - 28/15 * 55/49) :

(3 1/12 - 1 25/36)=(1/1 *19/6 - 4/3 * 11/7):(2 3/36 - 25/36)=(19/6-44/21):(1 (39-25)/36)=

(19/6-44/21):(1 (39-25)/36)=(133-88)/42 : 1 7/18= 15/14 * 18/25=3/7 * 9/5=27/35 .ошаговое