You can conclude that AE = DE because the triangles are about equal
Answer:
The steps below show how I transformed the equation in the question into standard form, where the slope and y-intercept is clearest. The slope is -1/2 and the y-intercept is 32.

The answer is 30
2 * 15 = 30
5 * 6 = 30
30 is between 24 and 34