Respuesta :

davidtung123123

Answer:

18

Step-by-step explanation:

because their is 4 numbers multiply 14 by 4       14*4=56

then minus the three numbers you have to get 18 56-11-20-7=18
11+20+7+x= (4)(14)
38+x=56
-38+x=56-38
X=18