No, it multiplies by -1 each time. Arithmetic sequences add or subtract by a constant number
450/5= 90 units
90/5= 18 units
All you need to do is divide the real dimensions by the scale dimensions, and turn that answer to units. Notice: It said 1 unit: 5 feet
The scale drawing was 90 to 18 units.
I hope this helps!
~kaikers
3x=78+x-2 is the answer. Good luck on your homework!