Question

Найдите известный член отношения : 1) х : 5/7 = 8 3/4 ; 2) 72 : х 9 ; 3) х : 3 1/7 = 1 1/20​

Answer 1

Ответ:

Пошаговое объяснение:

1) x : 5/7 = 8 3/4 = (8*4+3)/4 = 35/4

x * 7/5 = 35/4

x = (35*5) / (4*7) = 35/7 * 5/4 = 5*5/4 = 25/4 = 6 1/4

2) 72 : x = 9

x = 72 / 9 = 8

3) x : (3 1/7) = 1 1/20

x : 22/7 = 21/20

x * 7/22 = 21/20

x = (21*22) / (20*7) = 21/7 * 22/20 = 3*11/10 = 33/10 = 3 3/10