SOLUTION: Norma saved nickels and dimes the first 50 coins she saved were worth 3.90 how many of each type had she saved

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Question 826980: Norma saved nickels and dimes the first 50 coins she saved were worth 3.90 how many of each type had she saved
Answer by stanbon(75887) About Me  (Show Source):
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Norma saved nickels and dimes the first 50 coins she saved were worth 3.90 how many of each type had she saved
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Quantity Eq:: n + d = 50 coins
Value Eq:: 5n+10d = 390 cents
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Modify for elimination:
n + d = 50
n + 2d= 78
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Subtract and solve for "d":
d = 28 (# of dimes)
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Solve for "n"::
n + d = 50
n + 28 = 50
n = 22 (# of nickels)
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Cheers,
Stan H.
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