Question

Determine o valor de x para que se tornem equivalentes:

Answer 1

a) 2/3 = 20/30
b) 36/40 = 18/20
c) 1/5 = 9/45
d) 27/36 = 3/4 

Answer 2

Boa noite

a)

2 / 3 = x / 30

multiplica cruzado..

60 = 3x

x = 60 / 3

x = 20

b)

36 / 40 = x / 20

40x = 720

x = 720 / 40 

x = 18

c)

x / 5 = 9 / 45

45x = 45

x = 45 / 45

x = 1 

d)

27 / 36 = x / 4 

36x = 108

x = 108 / 36

x = 3