SOLUTION: a piggy bank has $4.40 in nickels, dimes and quarters. there are twice as many quarters than nickles and 5 more dimes than nickles. how many coins are there for dimes quarters and

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Question 1109274: a piggy bank has $4.40 in nickels, dimes and quarters. there are twice as many quarters than nickles and 5 more dimes than nickles. how many coins are there for dimes quarters and nickles are there?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
5N%2B10D%2B25Q=440 <-- Total value of coins
.
.
Q=2N <--- Twice as many Q as N
.
.
D=5%2BN<--- Five more D than N
.
.
Substituting into the first equation,
5N%2B10%285%2BN%29%2B25%282N%29=440
5N%2B50%2B10N%2B50N=440
65N=390
Solve for N.
Then use the other equations to solve for D and Q.