Question

Answer 1

\(\dfrac{-15}{35}=\dfrac{x}{42}=\dfrac{-30}{y}=\dfrac{60}{z}\)

\(\dfrac{-3}{7}=\dfrac{x}{42}=\dfrac{-30}{y}=\dfrac{60}{z}\)

\(\Rightarrow\left\{{}\begin{matrix}x=\dfrac{\left(-3\right)\times42}{7}=-18\\y=\dfrac{\left(-30\right)\times7}{\left(-3\right)}=70\\z=\dfrac{7\times60}{\left(-3\right)}=-140\end{matrix}\right.\)

Answer 2

=>x/42=-30/y=60/z=-3/7

=>x=-18; y=42; z=-140

Answer 3

Xét \(-\dfrac{15}{35}=\dfrac{x}{42}=\dfrac{-3}{7}=-\dfrac{18}{42}\Rightarrow x=-18\)

\(-\dfrac{15}{35}=-\dfrac{30}{y}\Leftrightarrow\dfrac{-30}{70}=-\dfrac{30}{y}\Rightarrow y=70\)

\(\dfrac{60}{z}=-\dfrac{15}{35}\Leftrightarrow\dfrac{60}{z}=\dfrac{-60}{140}\Rightarrow z=-140\)