Question

giúp tớ nhá!!!!!!

Answer 1

\(\dfrac{5-x}{-25-y}=\dfrac{x}{y}\)

\(\Rightarrow5y-xy=-25x-xy\)

\(\Rightarrow5y=-25x\)

\(\Rightarrow y=-5x\)

\(\Rightarrow\dfrac{y}{x}=-5\)

Vậy \(\dfrac{y}{x}=-5\)

Answer 2

-5

Answer 3

\(\dfrac{5-x}{-25-y}=\dfrac{x}{y}=\dfrac{5-x+x}{-25-y+y}=\dfrac{5}{-25}=\dfrac{1}{-5}\)

\(\Rightarrow\dfrac{y}{x}=\dfrac{-5}{1}=-5\)