Not sure about the statement
movement down 5 units
move right 2 units
Answer to your question:
D = d < -6
5/13t= -9
Then t =( -9*13) / 5
T=-23.4
D, it’s the only answer that equals 30. When splitting up the 6, you’re doing the distributive property, which is what D is doing.
To answer you need to isolate T so you add 19 to both sides. so T = 36
Hope that helped! If you don't get it message me and I can try to re explain :)