Question

2x=3y=5zvà x+y-z=95

Answer 1

\(2x=3y=5z\Rightarrow\frac{x}{15}=\frac{y}{10}=\frac{z}{6}\)(Cùng chia cho 30 )

Áp dụng t/c  dãy tsbn \(\frac{x}{15}=\frac{y}{10}=\frac{z}{6}=\frac{x+y-z}{15+10-6}=\frac{95}{19}=5\)

\(\Rightarrow\hept{\begin{cases}x=5.15=75\\y=5.10=50\\z=5.6=30\end{cases}}\)

Answer 2

Ta có 2x=3y=5z

\(\Rightarrow\frac{2x}{30}=\frac{3y}{30}=\frac{5z}{30}\)

\(\Rightarrow\frac{x}{15}=\frac{y}{10}=\frac{z}{6}=\frac{x+y-z}{15+10-6}=\frac{95}{19}=5\)

\(\frac{x}{15}=5\Rightarrow x=75\)

\(\frac{y}{10}=5\Rightarrow y=50\)

\(\frac{z}{6}=5\Rightarrow z=30\)

Vậy x = 75 ; y = 50 ; z = 30

Answer 3

cảm ơn hai bạn