Question

Помогите всё примеры 3 здание кто сделал правилино ;)

Answer 1

72/80 -(х-12/80)=15/80

х-12/80= 72/80- 15/80

х-12/80=57/80

х=57/80+12/80

х=69/80

116/125-(41/125-х)=94/125

41/125-х= 116/125-94/125

41/125-х= 21/125

х= 41/125-21/125

х=20/125

4/40+у+16/40=31/40+6/40

4/40+у+16/40=37/40

4/40+у=37/40-16/40

4/40+у=21/40

у=21/40-4/40

у=17/40

60/90-(6/90+х)=29/90

6/90+х=60/90-29/90

6/90+х=31/90

х=31/90-6/90

х=25/99

Answer 2

Пошаговое объяснение:

72/80 - (х - 12/80) = 15/80

х - 12/80 = 72/80 - 15/80

х - 12/80 = 57/80

х = 57/80 + 12/80

х = 69/80

116/125 - (41/125 - х) = 94/125

41/125 - х = 116/125 - 94/125

41/125 - х = 22/125

х = 41/125 - 22/125

х = 19/125

4/50 + у + 16/40 = 31/40 + 6/40

20/40 + у = 37/40

у = 37/40 - 20/40

у = 17/40

60/90 - (6/90 + х ) = 29/90

6/90 + х = 60/90 - 29/90

6/90 + х = 31/90

х = 31/90 - 6/90

х = 25/90