Problema Solution
Maria has 30 nickels and dimes worth $2.40. How many nockels does she have?
Answer provided by our tutors
1 nickle = 5 cents
1 dime = 10 cents
let
n = the number of nickles that Maria has
d = the number of dimes that Maria has
Maria has 30 nickels and dimes worth $2.40
n + d = 30
the value of the dimes and nickles id $2.40 = 240 cents
5n + 10d = 240
by solving the system of equations
n + d = 30
5n + 10d = 240
we find
d = 18 dimes
n = 12 nickles
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