Respuesta :

Answer:

x = 3

Step-by-step explanation:

A___B___C

AC = AB+ BC

5x +15 =(2x+4) + ( 20)

5x + 15 = 2x + 24

5x - 2x = 24 - 15

3x = 9

x = 9/3

x = 3

I hope I helped you^_^