Question

Помогите плиз вот фото

Answer 1

Ответ:

1. 72/80 - (x - 12/80) = 15/80

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

84/80 - x = 15/80

-x = 15/80 - 84/80

x = 69/80

.

2. 116/125 - (41/125 - x) = 94/125

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

75/125 + x = 94/125

x = 94/125 - 75/125 = 19/125

.

3. 4/40 + y + 16/40 = 31/49 + 6/40

20/40 + y = 31/49 + 6/40

y = 31/49 + 6/40 - 20/40 = 31/49 - 14/40

.

4. 60/90 - 6/90 - x = 29/90

54/90 - x = 29/90

-x = -25/90 = 25/90 = 5/18

Answer 2

80/72-(х-80/12)=80/15
х-80/12=80/72-80/15
х-80/12=80/57
х=80/12+80/57
х=80/69
——————————————
80/72-(80/69-80/12)=80/15
80/15=80/15



125/116-(125/41-х)=125/94
125/41-х=125/116-125/94
125/41-х=125/22
х=125/41-125/22
х= 125/19
————————————————
125/116-(125/41-125/19)=125/94
125/94=125/94



40/4+у+40/16=40/31+40/6
40/20+у=40/37
у=40/37-40/20
у=40/17
————————————————-
40/4+40/17+40/16=40/31+40/6
40/37=40/37




90/60-(90/6+х)=90/29
90/6+х=90/60-90/29
90/6+х=90/31
х=90/31-90/6
х=90/25
——————————————-
90/60-(90/6+90/25)=90/29
90/29=90/29