Aligning Featured Image (Post Thumbnails) LEFT in TWENTY TEN

There are already many threads with solutions for this problem but unfortunately none of them could help me fix this issue on my website.

I want to align post thumbnails on homepage in line with text but for some reason they’re showing above the title of each posts.

I have followed this guideline, but the featured images/thumbnails simply show above the text and not left.
https://www.ads-software.com/support/topic/aligning-featured-image-post-thumbnails-left-in-twenty-twelve?replies=10

I also tried this one, also with parital success: the thumbnails show up but above the text.
https://wpshed.com/wordpress-how-to-add-post-thumbnails-next-to-post-excerpt/