Question

Answer 1

=>2/5-1/3(x-1/2)=1/4

=>1/3(x-1/2)=3/20

=>x-1/2=9/20

=>x=19/20

Answer 2

\(\dfrac{2}{5}-\dfrac{1}{3}\left(x-\dfrac{1}{2}\right)=\dfrac{2}{4}=\dfrac{1}{2}\Leftrightarrow\dfrac{1}{3}\left(x-\dfrac{1}{2}\right)=-\dfrac{1}{10}\)

\(\Leftrightarrow x-\dfrac{1}{2}=-\dfrac{3}{10}\Leftrightarrow x=\dfrac{1}{5}\)

Answer 3

`2/5 -1/3(x-1/2) = 1/2 -1/4`

`<=> 1/3x - 1/2 * 1/3 = 2/5 - (2/4 + 1/4)`

` <=>  1/3x - 1/6 = -7/20`

`=> 1/3x = -7/20 + 1/6 = -11/60`

`=> x = -11/60 : 1/3 = -11/60 * 3 `

`x =-11/20`

Vậy `x=-11/20`

Answer 4

`2/5 - 1/3(x-1/2) = 1/4`

`1/3(x-1/2) = 2/5 - 1/4`

`1/3(x-1/2)= 3/20`

`x-1/2 = 9/20`

`x = 1/2 + 9/20`

`x= 19/20`