Question

[Đinh Cẩm Vân]

tìm x biết : 10^x:5^Y=20^Y

Answer 1

[Huỳnh Minh Trí]

Tìm x: \(10^x:5^y=20^y\)

\(10^x:5^y=20^y\)

\(10^x=20^y.5^y\)

\(10^x=100^y\)

\(10^x=10^{2y}\)

\(\Rightarrow x=2y\)