Question

-2/5+4/5•x=3/5

Answer 1

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

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

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

\(\Rightarrow x=1:\dfrac{4}{5}=\dfrac{1.5}{4}=\dfrac{5}{4}\)

Vậy x = \(\dfrac{5}{4}\)

Answer 2

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

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

=>\(\dfrac{4}{5}\)x=\(\dfrac{6}{5}\)

=>x=\(\dfrac{6}{5}\):\(\dfrac{4}{5}\)

=> x=\(\dfrac{3}{2}\)

Answer 3

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

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

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

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

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

Answer 4

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

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

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

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

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

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