Question

235 – 4^{2x – 1} = 171 

Answer 1

\(\Leftrightarrow2x-1=3\)

hay x=2

Answer 2

\(235-4^{2x-1}=171\\ \Leftrightarrow4^{2x-1}=64\\ \Leftrightarrow4^{2x-1}=4^3\\ \Leftrightarrow2x-1=3\\ \Leftrightarrow2x=4\\ \Leftrightarrow x=2\)

Answer 3

\(235-4^{2x-1}=171\\ \Rightarrow4^{2x-1}=235-171\\ \Rightarrow4^{2x-1}=64\\ \Rightarrow4^{2x-1}=4^3\\ \Rightarrow2x-1=3\\ \Rightarrow2x=4\\ \Rightarrow x=2\)