Respuesta :

thishigopal

Answer:

53

Step-by-step explanation:

in rhombus, opp angeles are equal.

4x+9 =(11x-3)/2--ac bisects the angle dab

8x+18 = 11x-3

3x = 21

x=7

angle dab = 11*7-3/(2)= 77-3/(2)= 74/2= 37

total of angles = 180

74+2x = 180

2x = 106

x=53