Question

Tommy's piggy bank contains $8.40 in nickels and pennies if there were 60 more nickels than pannies, how many of each did he have on the piggy bank?

Answer 1

let n = nickels = 60 + p (so...p = n-60)
p = pennies

5(cents)n + 1 (cent)p = 840 cents

5n + p = 840 so....p = 840 - 5n

since it has been sated a while ago that p = n -60 and p = p then...

n - 60 = 840 - 5n

5n + n = 840 + 60
6n = 900
n = 900/6

n = 150
p = 150 - 60 = 90

Answer 2

Thank you very much!