We see that both angle MON and angle LOM make up angle LON. So...how does that help us? Well, we can form an equation!
133 = 2x + 33 + 3x + 20
133 = 5x + 53
80 = 5x
16 = x
Plug that back into 2x + 33:
16 ( 2 ) + 33 = 32 + 33 = 55
So no, guest, there is no possible way MON is 14. We we know that x HAS to be positive, and 14 is less than 33.
:)