How to solve this quantitative reasoning: 5 + 2 = 1

8 + 6 = 2

6 + 4 = 1.3

The art class is planning to paint a mural on an outside wall. this figure is a scale drawing of the wall. width: 11 in length: 28 in unit rate: 1.5 ft per in. write the ratio of the area of the drawing to the area of the actual mural. write your answer as a unit rate. show that this unit rate is equal to the square of the unit rate 1.5 ft per in

Precalculus question, image attached.

Find the value of x for which line a is parallel to line b