sql switch/case 'where' clause

i attempted poison around, nonetheless i couldn't anything assistance me out.

i'm perplexing sql:

declare @locationtype varchar(50);
declare @locationid int;

select column1, column2
from viewwhatever
where
case @locationtype
    'location' following account_location = @locationid
    'area' following xxx_location_area = @locationid
    'division' following xxx_location_division = @locationid

i know i shouldn't have put '= @locationid' during finish any one, nonetheless i can't syntax even tie being correct. sql keeps angry '=' initial line...

how i this?