Respuesta :

Answer:

Step-by-step explanation:

I assume that XY is midsegment of a triangle, then MO = 2 XY

9x - 20 = 2( 3x - 4 )

9x - 20 = 6x - 8

3x = 12

x = 4

MO = 9(4) - 20 = 16 units