Question

 

cho tỉ lệ thức 5x-2y/3x+4y=3/4.tính tỉ số x:y

Answer 1

\(\frac{5x-2y}{3x+4y}=\frac{3}{4}\Rightarrow9x+12y=20x-8y\)

\(\Rightarrow11x=20y\)

\(\Rightarrow\frac{x}{y}=\frac{20}{11}\)

Answer 2

20/11 can cach lam kb nhac cho 

k nua nha

Answer 3

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

\(=>\left(5x-2y\right).4=\left(3x+4y\right).3\)

\(=>20x-8y=9x+12y\)

\(=>20x-9x=12y+8y\)

\(=>11x=20y\)

\(=>\frac{x}{y}=\frac{20}{11}\)

vay \(\frac{x}{y}=\frac{20}{11}\)

Answer 4

\(\frac{20}{11}\)