I need help?????? Thanks, Will be marking brainiest

Answer:
a=22
Step-by-step explanation:
Ⓗⓘ ⓣⓗⓔⓡⓔ
Well, 0.5a=11
11x2=22
The answer is 22!
(っ◔◡◔)っ ♥ Hope this helped! Have a great day! :) ♥
BTW, brainliest would be greatly appreciated, I only need one more before I advance, thanks!