Question 389909: Anne has $3.90 in dimes and quarters she has 4 more dimes than quarters how many coins of each kind does she have. Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Anne has $3.90 in dimes and quarters she has 4 more dimes than quarters how many coins of each kind does she have.
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Equations:
Quantity: d = q + 4
Value:: 10d + 25q = 390 cents
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Substitute for "d" and solve for "q":
10(q+4) + 25q = 390
10q+40 + 25q = 390
35q = 350
q = 10 (# of quarters)
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Since d = q+r, d = 14 (# of dimes)
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Cheers,
Stan H.
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