Respuesta :

Answer:

D

Step-by-step explanation:

7x+12+40=11x+6

7x+52=11x+6

48=4x

12=x

xenia168

Answer:

12

Step-by-step explanation:

(11x + 6)° = (7x + 14)° + 40°

11x + 6 = 7x + 14 + 40

4x = 48

x = 12