Question

Biết \(\dfrac{x - y}{x + 2y} = \dfrac{3}{4}\). Hãy tìm tỉ số \(\dfrac{x}{y}\)

Answer 1

\(\dfrac{x-y}{x+2y}=\dfrac{3}{4}\Leftrightarrow4\left(x-y\right)=3\left(x+2y\right)\\ \Leftrightarrow4x-4y=3x+6y\\ \Leftrightarrow x=10y\Leftrightarrow\dfrac{x}{y}=10\)

Answer 2

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

\(\Rightarrow4\left(x-y\right)=3\left(x+2y\right)\)

\(\Rightarrow4x-4y=3x+6y\)

\(\Rightarrow x=10y\)

\(\dfrac{x}{y}=\dfrac{10y}{y}=10\)