Question

[duong tra my]

\(\left(\dfrac{1}{2}X-\dfrac{3}{3}\right)\). \(\dfrac{1}{3}-\dfrac{2}{3}\) =\(\dfrac{-5}{12}\)

Answer 1

[Nguyễn Xuân Quang]

(1/2x-3/3).1/3-2/3=-5/12

(1/2x-1).1/3=-5/12+2/3

(1/2x-1).1/3=1/4

1/2x-1=1/4:1/3

1,2x-1=3/4

1,2x=7/4

x=7/4:1/2

x=7/2

Answer 2

[ミ★Zero ❄ ( Hoàng Nhật )]

\(\left(\dfrac{1}{2}X-\dfrac{3}{3}\right).\dfrac{1}{3}-\dfrac{2}{3}=-\dfrac{5}{12}\)

\(\Leftrightarrow\dfrac{1}{6}X-\dfrac{1}{3}-\dfrac{2}{3}=-\dfrac{5}{12}\)

\(\Leftrightarrow\dfrac{1}{6}X-1=-\dfrac{5}{12}\Leftrightarrow\dfrac{1}{6}X=\dfrac{7}{12}\)

\(\Leftrightarrow X=\dfrac{7}{12}:\dfrac{1}{6}=\dfrac{7}{12}.6=\dfrac{7}{2}\)