9,4х-7,8х=1-0,25
1,6х=0,75
Х=0,75:1,6
Пошаговое объяснение:
5 * (9/14 + 5/7) - 1 : 3/4 * 75/56 = 5,
1) 9/14 + 5/7 = 9/14 + 10/14 = 19/14 = 1 5/14,
2) 5 * 1 5/14 = 5 * 19/14 = 95/14 = 6 11/14,
3) 1 : 3/4 = 1 * 4/3 = 4/3 = 1 1/3,
4) 1 1/3 * 75/56 = 4/3 * 75/56 = 25/14 = 1 11/14,
5) 6 11/14 - 1 11/14 = 5
5/3 х - 4/9=11/6 х-1/2
(11-10)\6 х =9/18 - 8/18
1/6х=1/18
х=1/18:1/6=1/3