Пошаговое объяснение:

11y:20=16:80

in this equation multiplication of two middle numbers is equal to multiplication of other 2 numbers.

Ответ:

Пошаговое объяснение:

11y/20 = 16/80

11y = (20 × 16)/80

11y = 4

y = 4/11

2) 5,1/8,7 = 34y/29

34y = (29 × 5,1)/8,7

34y = 252,3

y = 252,3 : 34

y = 2523/340

y = 7    143/340

3) 7,2/2,7 = 32y/3

32y = (7,2 × 3)/2,7

32y = 8

y = 1/4