A)3 целых 2/15 x +1 целая 7/10 x =9 целых 2/3 б) (x- 3/8 x ) * 2 целые 4/5 - 1 целая 3/14 = 2 целые 2/7

3 2/15 x +1 7/10 x =9 2/3
47/15x + 17/10x = 29/3
94/30x + 51/30x = 290/30
145/30x = 290/30
x = 290/30:145/30
x=290/30*30/145
x=2

(x- 3/8 x ) * 2 4/5 - 1 3/14 = 2 2/7
5/8x* 14/5 - 17/14 = 16/7
7/4x = 16/7 + 17/14
7/4x = 32/14+17/14
7/4x = 49/14
x = 49/14:7/4=49/14*4/7=2