Respuesta :

choixongdong
B is the midpoint of AC
so
AB = BC
x+5 =  2x-11
x - 2x = -11 - 5
-x = -16
x = 16

AB = 16 +5
AB = 21

answer
21
mknzynonrcross
x  +  5  =   2x  -   11
-x   +11     -x      +11
x =16