Question

Giải đầy đủ giúp mik nhé

Answer 1

\(x+\dfrac{21}{40}=\dfrac{53}{40}\)

\(x=\dfrac{53-21}{40}=\dfrac{32}{40}\)

 

\(\dfrac{20+14}{35}:x=\dfrac{17}{5}\)

\(\dfrac{34}{35}:x=\dfrac{17}{5}\)

\(x=\dfrac{34}{35}:\dfrac{17}{5}=\dfrac{170}{595}\)

Answer 2

x + 21/40 = 53/40

x = 53/40 - 21/40

x = 32/40 = 4/5

 

34/35 : x = 17/5

x = 34/35 : 17/5

x = 2/7