Answer:
I think I got it but dont think it's right but -6m-n+3
Step-by-step explanation:
So -3(2m-1) if you multiply-3 by 1 it will equal -3 so if you multiply it by 2 that equals -6 so then you have -6m-n-3 but If you dont thinks it's right dont awnser with my awnser
