Answer:
18
Step-by-step explanation:
Points A B C D and E are collinear.
[tex]\therefore AE = AC + CE\\
\therefore AC = AE - CE\\
\therefore AC = x + 50 - (x + 32) \\
\therefore AC = x + 50 - x - 32 \\
\therefore AC = 50 - 32 \\
\huge \red{ \boxed{\therefore AC = 18}}[/tex]