Jacob has exactly 84 cents in his pocket. he only has dimes and quartere. how many pennies does he have if he has 3 dimes

3 dimes

3 times 10=30

30 cents are dimes

84=dimes+quarters

84=30+quarters

minus 30

54=quartesr

that can't be right

quartesr go like this

1 quarter=25

2 quarter=50

3 quarters=75

maybe there are pennies even though a penny is neither a dime nor a quarter

2 quarters make 50

4 pennies make the last 4

I guess 4 pennies