Question

biết \(\frac{3-2x}{3}=\frac{5-7y}{5}\) và \(x;y\ne0.\)khi đó: x/y=?

Answer 1

\(\frac{21}{10}\)

Answer 2

\(VERY-GOOD\)

Answer 3

\(\frac{3-2x}{3}=\frac{5-7y}{5}\\ \Rightarrow\left(3-2x\right)\cdot5=\left(5-7y\right)\cdot3\)

\(\Rightarrow15-10x=15-21y\)

hay 10x=21y

\(\Rightarrow\frac{x}{21}=\frac{y}{10}hay\\ \)\(\frac{x}{y}=\frac{21}{10}\)

Answer 4

Ta có : \(\frac{3-2x}{3}=\frac{5-7y}{5}\)

\(\Leftrightarrow5\left(3-2x\right)=3\left(5-7y\right)\)

\(\Leftrightarrow15-10x=15-21y\)

\(\Leftrightarrow10x=21y\)

\(\Leftrightarrow\frac{x}{21}=\frac{y}{10}\Leftrightarrow\frac{x}{y}=\frac{21}{10}\)