\( \log _{7} 49=\log x \)
\( x = 49 \)
Step 1 :\( \log _{7} 49 = \log _{7} x \)
Step 2 :\( \log _{7} 7^2 = \log _{7} x \)
Step 3 :\( x = 7^2 \)
Step 4 :\( x = 49 \)