Question 19303
Since you need $211 and it's $2 per wash, all you need to do is divide the two. 
{{{211/2=105.5}}}
You can't do {{{1/2}}} a carwash and if you do 105 car wahses, you end up with $210 which isn't enough. So, you need to do 106 car washes.  
Hope this helps!