г) (y - 35) + 12 = 32

| способ.

y - 35 + 12 = 32

y = 32 - 12 + 35

y = 55

|| способ.

y - 35 = 32 - 12

y - 35 = 20

y = 35 + 20

y = 55

Ответ: 55

ПРОВЕРКА:

(55 - 35) + 12 = 32

20 + 12 = 32

32 = 32

ч.т.д.

_______________________________

д) 56 - (x + 12) = 24

| способ.

56 - x - 12 = 24

44 - x = 24

x = 44 - 24

x = 20

|| способ.

x + 12 = 56 - 24

x + 12 = 32

x = 32 - 12

x = 20

Ответ: 20

ПРОВЕРКА:

56 - (20 + 12) = 24

56 - 32 = 24

24 = 24

ч.т.д.

____________________________

е) 55 - (x - 15) = 30

| способ.

55 - x + 15 = 30

55 - x = 30 - 15

55 - x = 15

x = 55 - 15

x = 40

|| способ.

x - 15 = 55 - 30

x - 15 = 25

x = 25 + 15

x = 40

Ответ: 40

ПРОВЕРКА:

55 - (40 - 15) = 30

55 - 25 = 30

30 = 30

ч.т.д.