Câu trả lời:
Ta đặt \(\frac{x}{2}=\frac{y}{3}=\frac{z}{5}=k\)
\(\Rightarrow x=2k;y=3k;z=5k\)
\(\Rightarrow xyz=2k.3k.5k\)
\(\Rightarrow xyz=30.k^3\)
\(\Rightarrow810=30.k^3\)
\(\Rightarrow k^3=810:30=27\)
\(\Rightarrow k=3\)
Nên x = 3 x 2 = 6
y = 3 x 3 = 9
z = 3 x 5 = 15