Question

Уравнение : log 3(x-4)=2

Answer 1

log 3(x-4)=2
ОДЗ  х-4>0
(х-4)=3^2
x-4=9
x=9+4
x=13
13-4>0
х=13 

Answer 2

$log_3(x-4)=2\x-4 textgreater 0\x textgreater 4\\log_3(x-4)=log_39\x-4=9\x=9+4\x=13( textgreater 4)\\x=13$