I found this site with online problems and answers. https://courses.lumenlearning.com/waymakercollegealgebra/chapter/expand-and-condense-logarithms/
I've tried several problems and my answer is always wrong.
I've added two screenshots: 1) the problem and the answer according to the site
2) my work and answer
Could someone please explain what I'm doing wrong? I don't understand why the denominator disappears.