№ 222
a) 8 8/11 - z = 3 9/11
8 8/11 - 3 9/11 = z
z = 4 10/11
б) y - 4 3/5 = 2 4/5
y = 2 4/5 + 4 3/5
y= 6 7/5 = 7 2/5
в) 8 16/27 - ( x - 2 17/27) = 8 5/27
8 16/27 - x + 2 17/27 = 8 5/27
8 16/27 + 2 17/27 + 8 5/27 = X
18 38/27 = x
x = 19 11/27
№223
(7 5/14 + 2 9/14) - 3 5/8= 10 - 3 5/8 = 6 3/8
12 2/13 - (8 12/13 +1 5/13) = 12 2/13 - 10 4/13 = 1 11/13