1) (x - 3 9/ 13) + 5 10/13 = 12 4/13
(x - 27/13) + 50/13 = 48/13
x - 27/13 + 50/13 = 48/13
x + 23/13 = 48/13
x = 48/13 - 23/13
x = 25/13
Ответ: 25/13
2) (3 9/16 - y) + 4 9/16 = 5 7/16
(27/16 - y) + 9/4 = 35/16
27/16 - y + 9/4 = 35/16
63/16 - y = 35/16
- y = 35/16 - 63/16
- y = - 7/4 /: (-1)
y = 7/4
Ответ: 7/4
3) 13 16/27 + (x - 2 17/27) = 30 5/27
208/27 + (x - 34/27) = 10* 5/9
208/27 + x - 34/27 = 50/9
58/9 + x = 50/9
x = 50/9 - 58/9
x = - 8/9
Ответ: - 8/9
4) (y - 2 4/25) + 4 7/25 = 14 6/25
(y - 8/25) + 28/25 = 84/25
y - 8/25 + 28/25 = 84/25
y + 4/5 = 84/25
y = 84/25 - 4/5
y = 64/25
Ответ: 64/25