SOLUTION: Concha has 9 coins in her pocket the coins value is $0.84 what coins does she have in her pocket

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Question 1067348: Concha has 9 coins in her pocket the coins value is $0.84 what coins does she have in her pocket
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39620) About Me  (Show Source):
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The coins must contain maybe, four pennies.

system%284%2Bn%2Bd%2Bq=9%2C4%2B5n%2B10d%2B25q=84%29

system%28n%2Bd%2Bq=5%2C5n%2B10d%2B25q=80%29

Trying to eliminate n,
system%285n%2B5d%2B5q=25%2C5n%2B10d%2B25q=80%29

5d%2B20q=55

d%2B4q=11----------Can you find whole number values for this equation and will one of the combinations work?
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4q=-d%2B11
q=-d%2F4%2B11%2F4
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graph%28300%2C300%2C-2%2C8%2C-4%2C4%2C-x%2F4%2B11%2F4%29
7 and 1? --------(Not this one; it will not work.)
3 and 2?
Nickels and Quarters?

Answer by ikleyn(52798) About Me  (Show Source):
You can put this solution on YOUR website!
.
Answer. 4 pennies, 2 quarters and 3 dimes.

Hint.

1) 4 pennies must present.

2) Then the remaining is 80 cents presented by 5 coins.

3) It is clear that the only possible combination for it is 2 quarters and 3 dimes.