\(\frac{3}{x}=\frac{y}{35}=\frac{-36}{84}\)
xét : \(\frac{3}{x}=\frac{-36}{84}\)
\(\Rightarrow\) \(3\cdot84=-36\cdot x\)
\(\Rightarrow\) \(252=-36\cdot x\)
\(\Rightarrow\) \(252:\left(-36\right)=x\)
\(\Rightarrow\) \(-7=x\)
thay vào x ta có:
\(\frac{3}{-7}=\frac{y}{35}=\frac{-36}{84}\)
xét \(\frac{3}{-7}=\frac{y}{35}\)
\(\Rightarrow\) \(3\cdot35=-7\cdot y\)
\(\Rightarrow\) \(105=-7\cdot y\)
\(\Rightarrow\) \(105:\left(-7\right)=y\)
\(\Rightarrow\) \(-15=y\)
vậy x = 3 ; y = -15