Question

\(\frac{x}{y}\)= \(\frac{3}{2}\) và x - 2y = 3

\(\frac{x-3}{2-y}\) =   \(\frac{-4}{3}\) VÀ  X + Y = 12

Answer 1

1 nốt nhạc là xong

Answer 2

\(\frac{x}{y}=\frac{3}{2}\Rightarrow\frac{x}{3}=\frac{y}{2}\)

\(\Rightarrow\frac{y}{2}=\frac{x}{3}=\frac{2y}{4}=\frac{x-2y}{3-4}=\frac{3}{-1}=-3\)

\(\Rightarrow y=-6,x=-9\)

Answer 3

\(\frac{x}{y}=\frac{3}{2}\Rightarrow\frac{x}{3}=\frac{y}{2}\)

Áp dụng ................

\(\frac{x}{3}=\frac{2y}{4}=\frac{x-2y}{3-4}=\frac{3}{-1}=-3\)

\(\Rightarrow\frac{x}{3}=-3\Rightarrow x=-9\)

\(\Rightarrow\frac{2y}{4}=-3\Rightarrow y=-6\)

Answer 4

\(\frac{x}{y}=\frac{3}{2}=>\frac{x}{3}=\frac{y}{2}=\frac{x}{3}-2y=>\frac{x-3y}{3}=\)\(\frac{3}{3}=1\)

\(\frac{x}{3}=1=>x=3.1=3\)

\(\frac{y}{2}=1=>y=2.1=2\) vậy : x=3 : y=2