Problema Solution
Sue tool her collection of nickels and dimes to deposit in the bank. She has five fewer nickels than dimes. Her total deposit was $45.20. How many dimes did she deposit?
Answer provided by our tutors
1 nickle = 5 cents
1 dime = 10 cents
let
n = the number of nickles
d = the number of dimes
She has five fewer nickels than dimes
n = d - 5
Her total deposit was $45.20 = 4520 cents
5n + 10d = 4520
plug n = d - 5 into the last equation we get
5(d - 5) + 10d = 4520
by solving we find
d = 303 dimes
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Sue deposited 303 dimes.