Пошаговое объяснение:
18/30 - x = 4/30 + 6/30
18/30 - x = 10/30
x = 18/30 - 10/30
x = 8/30
x = 4/15
(13/67 + 6/67) - x = 9/67
19/67 - x = 9/67
x = 19/67 - 9/67
x = 10/67
10/15 + ( 5/15 - x) = 14/15
10/15 + 5/15 - x = 14/15
15/15 - x = 14/15
x = 15/15 - 14/15
x = 1/15
34/60 + 8/60 + y = 41/60 + 16/60
42/60 + y = 57/60
y = 57/60 - 42/60
y = 15/60
y = 1/4
64/70 - (x + 26/70) = 5/70
64/70 - x - 26/70 = 5/70
38/70 - x = 5/70
x = 38/70 - 5/70
x = 33/70
x + 27/46 = 35/46 + 2/46
x + 27/46 = 37/46
x = 37/46 - 27/46
x = 10/46
x = 5/23
