Question

Tìm x

\(\dfrac{5}{7}+\dfrac{4}{5}-x=\dfrac{9}{7}\)

Answer 1

`5/7 + 4/5 - x = 9/7`

`=>4/5 - x = 9/7-5/7`

`=>4/5 - x =4/7`

`=>x=4/5-4/7`

`=>x= 8/35`

Answer 2

\(\dfrac{5}{7}+\dfrac{4}{5}-x=\dfrac{9}{7}\\ \dfrac{53}{35}-x=\dfrac{9}{7}\\ x=\dfrac{53}{35}-\dfrac{9}{7}\\ x=\dfrac{8}{35}\)