Problema Solution
Laura has $4.50 in dimes and quarters. She has 3 more dimes than quarters. How many quarters does she have?
Answer provided by our tutors
1 quarter = 25 cents
1 dime = 10 cents
let
q = the number of quarters
d = the number of dimes
she has 3 more dimes than quarters
d = 3 + q
Laura has $4.50 = 450 cents in dimes and quarters
25q + 10d = 450
by solving the system of equations
d = 3 + q
25q + 10d = 450
we find
d = 15 dimes
q = 12 quarters
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