Respuesta :

Answer:

XY = 18 units.

Step-by-step explanation:

The sum of the top and bottom lines = 2 * middle line, so:

6x + 1 + s = 2(4s - 2)

7s + 1 = 8s - 4

5 = s.

So XY = 4(5) - 2 = 18.