Question

\(\dfrac{x}{27}=\dfrac{2}{9}-\dfrac{1}{3}\)

Answer 1

\(\dfrac{x}{27}=\dfrac{2}{9}-\dfrac{1}{3}\)

\(\Leftrightarrow\dfrac{x}{27}=\dfrac{2}{9}-\dfrac{3}{9}\)

\(\Leftrightarrow\dfrac{x}{27}=-\dfrac{1}{9}\)

\(\Leftrightarrow9x=-27\)

\(\Leftrightarrow x=-\dfrac{27}{9}\)

\(\Leftrightarrow x=-3\)

Answer 2

\(\dfrac{x}{27}=\dfrac{2}{9}-\dfrac{1}{3}\)

\(\Leftrightarrow\dfrac{x}{27}=\dfrac{2}{9}-\dfrac{3}{9}\)

\(\Leftrightarrow\dfrac{x}{27}=-\dfrac{1}{9}\)

Suy ra :

\(9x=-27\)

\(\Rightarrow x=-3\)

Answer 3

\(\dfrac{x}{27}=\dfrac{2}{9}-\dfrac{1}{3}\)

\(\dfrac{x}{27}=\dfrac{-1}{9}\)

\(x=\dfrac{27.-1}{9}=\dfrac{-27}{9}\)

\(x=-3\)