Problema Solution
susan paid for her library fine with 29 coins consisting of nickels and dimes. if the fine was $2.20, how many coins were nickels?
Answer provided by our tutors
1 nickle = 5 cents
1 dime = 10 cents
let
n = the number of nickles
d = the number of dimes
Susan paid for her library fine with 29 coins consisting of nickels and dimes
n + d = 29
the fine was $2.20 = 220 cents
5n + 10d = 220
by solving the system of equations
n + d = 29
5n + 10d = 220
we find
d = 15 dimes
n = 14 nickles
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14 coins were nickles.