Question

Bài c aàbai c ạ 

Answer 1

c) 

Ta có:

\(\frac{2}{x}=\frac{14}{21}\)

Mà \(\frac{14}{21}=\frac{2}{3}\)

=> x = 3

Answer 2

\(\frac{2}{x}=\frac{14}{21}\Rightarrow x=\frac{2.21}{14}=3\)

Answer 3

2/x = 14/21 => x .14 =2 . 21

=>x .14 = 42 => x = 42/14 

                               x= 3