Пошаговое объяснение:
1) x: 9 1/6=3 3/4
x = 3 3/4 * 9 1/6
x = 15/4 * 55/6
x = 5/4 * 55/2
x = 275/8
x = 34 3/8
2) (1-7/10) x=2 1/4
3/10 x = 2 1/4
x = 2 1/4 : 3/10
x = 9/4 * 10/3
x = 3/2 * 5/1
x = 15/2
x = 7 1/2
