Craig has a twenty dollar bill. he buys six squirt guns for$2 each. how much money did craig have left?

I believe he had $8 left.

You just have to set up an equation and plug in the numbers and then solve like so- 

20 - 2x
20 - 2(6) 
20 - 12 
8

Craig has $8 left. Hope this helped, plz mark brainliest : )