13/60 + 6/60 - x = 9/60
19/60 - x = 9/60
x = 19/60 - 9/60
x = 9/60
5/100 + 8/100 + x = 20/100
13/100 + x = 2/100
x = 20/100 - 13/100
x = 7/100
Пошаговое объяснение:
13/60 + 6/60 - x = 9/60
19/60 - x = 9/60
x = 19/60 - 9/60
x = 9/60
5/100 + 8/100 + x = 20/100
13/100 + x = 2/100
x = 20/100 - 13/100
x = 7/100
Пошаговое объяснение: