Question

Answer 1

\(\dfrac{2}{3}-\dfrac{7}{8}.x=\dfrac{1}{3}\\ \dfrac{7}{8}.x=\dfrac{2}{3}-\dfrac{1}{3}\\\dfrac{7}{8}.x=\dfrac{1}{3}\\ x=\dfrac{1}{3}:\dfrac{7}{8}\\ x=\dfrac{8}{21} \)

Answer 2

\(=>\dfrac{7}{8}.x=\dfrac{2}{3}-\dfrac{1}{3}=\dfrac{1}{3}\)

\(=>x=\dfrac{1}{3}:\dfrac{7}{8}=\dfrac{1}{3}\cdot\dfrac{8}{7}=\dfrac{8}{21}\)

Answer 3

\(\dfrac{2}{3}-\dfrac{7}{8}.x=\dfrac{1}{3}\)

\(\Leftrightarrow\dfrac{7}{8}.x=\dfrac{2}{3}-\dfrac{1}{3}\)

\(\Leftrightarrow\dfrac{7}{8}.x=\dfrac{1}{3}\)

\(\Leftrightarrow x=\dfrac{1}{3}:\dfrac{7}{8}\)

\(\Leftrightarrow x=\dfrac{1}{3}.\dfrac{8}{7}\)

\(\Leftrightarrow x=\dfrac{8}{21}\)