Respuestas

2013-11-11T17:58:33+01:00
A) 2/9 = 14/ x 

2/9 · x = 14 
2x/9 = 14
2x= 14· 9 
x = 126/2
x = 63

2/9 = 14/63

b) x/10 = 6/20 

x = (6/20) · 10 
x = 60/20 
x = 3

3/10 = 6/20

c) 4/11 = x/55

4/11 · 55 = x 
220/11 = x
20 = x

4/11 = 20/55

d) 21/x = 7/16

21 = 7/16 · x 
(21 · 16)/7 = x 
336/ 7 = x 
48 = x 

21/48 = 7/16