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
Add 2 to both sides...x>3
3n² - 8n + 4
3n² - 6n - 2n + 4
(3n - 2)(n - 2)