Molly bought "
6" packs of trading cards. Each pack cost "$
3". She ALSO bought 1 pack of gum. It cost "$
2".
Reading that, we can easily set up our problem, so, what you are going to do first is Multiply 6 and 3:

You've got your answer 18, now add it with 2:

So, your answer is:
$20
Good luck with your studies, I hope this helps~!