Question

Tìm x, y biết:

\(\frac{3}{x}\)=\(\frac{y}{35}\)=\(\frac{-36}{84}\)

Answer 1

Ta có : \(\frac{3}{x}=\frac{-36}{84}=\frac{3}{7}\) => \(x=7\)

  \(\frac{y}{35}=\frac{-36}{84}=\frac{3}{7}\)=> \(7y=3\cdot35\)=> \(y=\frac{3\cdot35}{7}=15\)

Answer 2

\(y=\frac{-36\times35}{84}=-15\)

\(x=\frac{35\times3}{-15}=-7\)

Vậy................

Answer 3

x= -7

y= -15

Answer 4

Ta có \(\frac{y}{35}=-\frac{36}{84}\)

\(\Rightarrow84y=-36.35\)

\(\Rightarrow84y=-1260\)

\(\Rightarrow y=-15\)

Thay y = -15 ta có \(\frac{3}{x}=\frac{-15}{35}\)

\(\Rightarrow\frac{3}{x}=\frac{-3}{7}\)

\(\Rightarrow-3x=21\)

\(\Rightarrow x=-7\)

Answer 5

x = 7

y=15