Problema Solution
Debi has 1.55 in a collection of dimes and nickels. The number of nickels is 7 more than the number of dimes. Find the number of each type of coin
Answer provided by our tutors
1 nickel = 5 cents
1 dime = 10 cents
Let
n = the number of nickels, n>=0, n is integer
d = the number of dimes, d>=0, d is integer
n = d + 7
5n + 10d = 155
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click here to see the system of equations solved for n and d
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n = 15 nickels
d = 8 dimes
Debi has 15 nickles and 8 dimes.