Question

Tìm x:

\(\dfrac{-2}{5}+\dfrac{4}{5}x=\dfrac{3}{5}\)

Answer 1

\(\dfrac{-2}{5}+\dfrac{4}{5}x=\dfrac{3}{5}\\ \dfrac{4}{5}x=\dfrac{3}{5}+\dfrac{2}{5}\\ \dfrac{4}{5}x=1\\ x=1:\dfrac{4}{5}\\ x=\dfrac{5}{4}\)

Answer 2

\(\dfrac{4}{5}x=\dfrac{3}{5}-\dfrac{-2}{5}\)

\(\dfrac{4}{5}x=1\)

-> x= \(\dfrac{5}{4}\)

Answer 3

Ta có: \(\dfrac{-2}{5}+\dfrac{4}{5}x=\dfrac{3}{5}\)

\(\Leftrightarrow\dfrac{4}{5}x=\dfrac{3}{5}+\dfrac{2}{5}=1\)

hay \(x=\dfrac{5}{4}\)

Vậy: \(x=\dfrac{5}{4}\)