Question

[Nguyễn Hải Long]

x/8=y/4;y/3=z/5va 2x-3y-z=6

Answer 1

[Nguyễn Hưng Phát]

\(\hept{\begin{cases}\frac{x}{8}=\frac{y}{4}\\\frac{y}{3}=\frac{z}{5}\end{cases}\Rightarrow\hept{\begin{cases}\frac{x}{24}=\frac{y}{12}\\\frac{y}{12}=\frac{z}{20}\end{cases}}}\)

\(\Rightarrow\frac{x}{24}=\frac{y}{12}=\frac{z}{20}=\frac{2x}{48}=\frac{3y}{36}=\frac{2x-3y-z}{48-36-20}=\frac{6}{-8}=-\frac{3}{4}\)

\(\Rightarrow\hept{\begin{cases}x=-18\\y=-9\\z=-15\end{cases}}\)

Answer 2

[Nguyễn Hải Long]

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