Question 999601
p = number of pennies
n = number of nickels
d = number of dimes



n = 7p
q = 3p
p + 5n + 25q = 555


Write everything in terms of p.


p + 5(7p) + 25(3p) = 555
111p = 555
p = 5


There are 5 pennies, 35 nickels, and 15 quarters.