Each pair of triangles is similar Find the value of x

x = 7

Step-by-step explanation:

You need to figure which sides correspond and set up the proportions

Labeling the vertices of the triangles would help you.

I did that and found that 5x - 15 ↔ 10 since both of those sides are opposite the 42° angles and 36 ↔ 18

So

18(5x - 15) = 10(36)

90x - 270 = 360

90x = 630

x = 7

∠cbe and ∠deb are same-side interior angles.

i took the test