Question

215-3.4^x=23

Answer 1

\(215-3.4^x=23\)

\(\Rightarrow3.4^x=215-23\)

\(\Rightarrow3.4^x=192\)

\(\Rightarrow4^x=192:3\)

\(\Rightarrow4^x=64\)

\(\Rightarrow4^x=4^3\)

\(\Rightarrow x=3\)

Answer 2

215-3.4^x=23

3.4^x=215-23

3.4^x=192

4^x=192:3

4^x=64

4^x=4^3

=> x=3

Vậy x=3