Problema Solution
When a child emptied his coin bank, he had a collection of pennies, nickels, and dimes. there were 20 mor pennies than dimes and the number of nickels was triple the number of dimes. If the coins had a value of $5.40, how many of each type coin were in the bank?
Answer provided by our tutors
let 'p' represent the number of pennies, then 'p-20' represents the number of dimes and 3(p-20) represents the number of nickels
We solve for the number of pennies (10* for each dime, 5* for each nickel):
5.40 = p + 10*(p-20) + 5*3(p-20)
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solve for the number of pennies
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p=19.43...
an non-integer result for the number of pennies indicates that the problem statement contains an error