Show posts side-by-side?

I’ve searched through and found one bit of CSS you give to make this possible (showing posts side-by-side instead of listed vertically) but the code didn’t work for me. I saw another post where you told the person that you’d tweaked the CSS to make this easier, but they never replied and so you didn’t share the code! Could I bother you for some help with this?

I’d appreciate it greatly! The site is at http://professionalchoicelawn.com.

Thanks!

https://ww.wp.xz.cn/plugins/recent-facebook-posts/