Question

tìm x

x/5 = 26/65                  3/x = 51/85

Answer 1

\(\dfrac{x}{5}=\dfrac{26}{65}\)

\(\Leftrightarrow65x=130\)

\(\Leftrightarrow x=2\)

\(\dfrac{3}{x}=\dfrac{51}{85}\)

\(\Leftrightarrow51x=255\)

\(\Leftrightarrow x=5\)

Answer 2

`x/5=26/65`

`65xx x=5xx26`

`65xx x=130`

`x=130:65=2`

`3/x=51/85`

`51xx x=3xx85`

`51xx x=255`

`x=255:51=5`

Answer 3

\(\dfrac{26x5}{65}=2\)

⇒ x = 2

 

\(\dfrac{85x3}{51}=5\)

⇒ x=5