Ответ:

Пошаговое объяснение:

18/30 - х = 4/30 + 6/30

18/30 - х = 10/30

х = 18/30 - 10/30

х = 8/30

(13/67 + 6/67) - х = 9/67

19/67 - х = 9/67

х = 19/67 - 9/67

х = 10/67

10/15 + (5/15 - х ) = 14/15

5/15 - х = 14/15 - 10/15

5/15 - х = 4/15

х = 5/15 - 4/15

х = 1/15

34/60 + 8/60 + у = 41/60 + 16/60

42/60 + у = 57/60

у = 57/60 - 42/60

у = 15/60

64/70 - (х + 26/70) = 5/70

х + 26/70 = 64/70 - 5/70

х + 26/70 = 59/70

х = 59/70 - 26/70

х = 33/70

х + 27/46 = 35/46 + 2/46

х + 27/46 = 37/46

х = 37/46 - 27/46

х = 10/46