Question 1024399
So, we know that Matt has 75 lollipops total originally.

He gives ONE lollipop per friend. Basically, each friend gets one lollipop. 

After he gives one lollipop to each of his friends, he has 57 remaining.

Subtract 57 from 75.

75 - 57 = 18

Matt gave away 18 lollipops.