Question

3> a) 7 1/7 + 2/5×X=3/7

Answer 1

`7 1/7 + 2/5 xx x=3/7`

`50/7 +2/5x =  3/7`

`2/5x=3/7 - 50/7`

`2/5x=-47/7`

`x=-47/7:2/5`

`x=-47/7 xx 5/2`

`x=-235/14`

Answer 2

` 7 1/7 + 2/5xx x=3/7`

`=> 50/7 + 2/5 xx x =3/7`

`=>2/5 xx x=3/7 -50/7`

`=>2/5 xx x=-47/7`

`=>x=-47/7 : 2/5`

`=>x=-47/7 xx5/2`

`=>x=-235/14`

Answer 3

Answer 4

\(7\dfrac{1}{7}+\dfrac{2}{5}\cdot x=\dfrac{3}{7}\)

\(\dfrac{50}{7}+\dfrac{2}{5}\cdot x=\dfrac{3}{7}\)

\(\dfrac{2}{5}\cdot x=\dfrac{3}{7}-\dfrac{50}{7}\)

\(\dfrac{2}{5}\cdot x=-\dfrac{47}{7}\)

\(x=\dfrac{-47}{7}:\dfrac{2}{5}\)

\(x=\dfrac{-235}{14}\)

Answer 5

\(7\dfrac{1}{7}+\dfrac{2}{5}\times x=\dfrac{3}{7}\\ \dfrac{50}{7}+\dfrac{2}{5}\times x=\dfrac{3}{7}\\ \dfrac{2}{5}\times x=\dfrac{3}{7}-\dfrac{50}{7}\\ \dfrac{2}{5}\times x=\dfrac{-47}{7}\\ x=\dfrac{-47}{7}:\dfrac{2}{5}\\ x=\dfrac{-235}{14}\)

Vậy \(x=\dfrac{-235}{14}\)