Question

log3 X + 2log3 (9X) =7

Answer 1

$log_{3}x+2log_{3}(9x)=7\log_{3}x+2log_{3}x+2log_{3}9=7\3log_{3}x+2*2=7\3log_{3}x+4=7\3log_{3}x=3|:3\log_{3}x=1\x=3$