\(\frac{3}{x}=\frac{y}{35}=\frac{-36}{84}\)
Ta có:\(\frac{y}{35}=\frac{-36}{84}\)
\(\Rightarrow y.84=-36.35\)
\(\Rightarrow y.84=-1260\)
\(\Rightarrow y=-1260:84\)
\(\Rightarrow y=-15\)
\(\Rightarrow\frac{3}{x}=\frac{-15}{35}\)
\(\Rightarrow3.35=-15x\)
\(\Rightarrow105=-15x\)
\(\Rightarrow x=-7\)
Vậy x=-7;y=-15 để .....