Question

Giả giúp mình vơi

Answer 1

`5/6-x=-3/7`

`=>x=5/6+3/7`

`=>x=53/42`

Vậy `x=53/42`.

`3x-2/5=1/2`

`=>3x=1/2+2/5`

`=>3x=9/10`

`=>x=3/10`

Vậy `x=3/10.`

Answer 2

a) Ta có: \(\dfrac{5}{6}-x=\dfrac{-3}{7}\)

nên \(x=\dfrac{5}{6}+\dfrac{3}{7}=\dfrac{35}{42}+\dfrac{18}{42}\)

hay \(x=\dfrac{53}{42}\)

b) Ta có: \(3x-\dfrac{2}{5}=\dfrac{1}{2}\)

nên \(3x=\dfrac{1}{2}+\dfrac{2}{5}=\dfrac{9}{10}\)

hay \(x=\dfrac{3}{10}\)