Hey there!
[tex]\bold{3(2m-6)}\\ \bold{Distribute\downarrow}\\\bold{3(2m) + 3(-6)}\\\bold{3(2m)=6m}\\ \bold{3(-6) =18}\\ \\ \\ \\ \boxed{\boxed{\bold{Answer: 6m-18}}}\huge\checkmark[/tex]
Good luck on your assignment and enjoy your day!
~[tex]\frak{LoveYourselfFirst:)}[/tex]