Question

tìm x: \(\frac{20}{x}< \frac{4}{5}\)

Answer 1

\(\frac{20}{x}< \frac{4}{5}\\ \Leftrightarrow\frac{20}{x}< \frac{20}{25}\\ \Leftrightarrow x>25\)

 

Answer 2

\(\frac{20}{x}< \frac{4}{5}\)

\(\Rightarrow x< \frac{20.5}{4}\)

\(\Rightarrow x< 25\)

Answer 3

sorry nhầm dấu

Answer 4

\(\frac{20}{x}< \frac{4}{5}\Rightarrow x>\frac{20.5}{4}\Rightarrow x>25\)