Hello Flyboswag25
We know that jack's mother has given jack 50 chocolate bars and was supposed to give 3 to each friend.
Unfortunately, 3 only goes to 48, So basically we can do 48/3 = 16
Since each friend is there.
We can do 50 - 3x = 2
Since 50 - 2 equals 48 (which is how many times 3 can go into)
16 kids are in Jack's party
:)