Hey there!
••In order to solve this problem you can use the "distributive property" ••
So,
• -3(2m) = -6m
• -3(-1) = 3
•••• Problem becomes: -6m + 3 + -m ••••
•• Combine your "like terms" ••
• -6m & -m
• -m = -1m
• 3 & 3
Problem becomes: (-6m + -1m ) + 3
-6m + -1m = -7m
Answer: -7m + 3
Good luck on your assignment and enjoy your day
~LoveYourselfFirst:)