SOLUTION: Warren has 40 coins (all nickels, dimes and quarters) worth $4.05. He has 7 more nickels than dimes. How many quarters does Warren have? Could you please show equation? Thank

Question 353379: Warren has 40 coins (all nickels, dimes and quarters) worth $4.05. He has 7 more nickels than dimes. How many quarters does Warren have? Could you please show equation?
Thank you
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Warren has 40 coins (all nickels, dimes and quarters) worth $4.05. He has 7 more nickels than dimes. How many quarters does Warren have? Could you please show equation?
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Equations:
n + d + q = 40 coins
5n+10d+25q = 405 cents
n = d + 7
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Rearrange and solve the system.
Cheers,
Stan H.
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