Question

\(5^{x+4}-3.5^{x+3}=2.5^{11}\)

Answer 1

\(5^{x+4}-3.5^{x+3}=2.5^{11}\)

\(\Rightarrow5^x.5^4-3.5^x.5^3=2.5^{11}\)

\(\Rightarrow5^x.5^3\left(5-3\right)=2.5^{11}\)

\(\Rightarrow5^x.2=2.5^8\)

\(\Rightarrow5^x=5^8\)

\(\Rightarrow x=8\)

Vậy \(x=8\)

 

Answer 2

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