Question

помогите решить уравнение ПЖ​

Answer 1

Ответ:

1)

72/80 - ( x - 12/80 ) = 15/80

x - 12/80 = 72/80 - 15/80

x - 12/80 = 57/80

x = 58/ 80 + 12/80

x = 70/80

72/80 - ( 70/80 - 12/80 ) = 15/80

72/80 - 58/80 = 15/80

15/80 = 15/80

2)

116/125 - ( 41/125 - x ) = 94/125

41/125 - x = 116/125 - 94/125

41/125 - x = 22/125

x = 41/125 - 22/125

x = 19/125

116/125 - ( 41/125 - 19/125 ) = 94/125

116/125 - 22/125 = 94/125

94/125 = 94/125

3)

4/40 + y + 16/40 = 31/40 + 6/40

4/40 + y + 16/40 = 37/40

y + 4/40 + 16/40 = 37/40

y + 20/40 = 37/40

y = 37/40 - 20/40

y = 17/40

4/40 + 17/40 + 16/40 = 31/40 + 6/40

4/40 + 17/40 + 16/40 = 37/40

37/40 = 37/40

4)

60/90 - ( 6/90 + x ) = 29/90

6/90 + x = 60/90 - 29/90

6/90 + x = 31/90

x = 31/90 - 6/90

x = 25/90

60/90 - ( 6/90 + 25/90 ) = 29/90

60/90 - 31/90 = 29/90

29/90 = 29/90

Пошаговое объяснение:

под чертой в каждом уравнение проверка. надеюсь помогла)))