Question 1202217
Mayra has $0.25 in nickels and dimes. The number of dimes is 5 less than twice the number of nickels. Find the number of nickels, n, by solving the equation (you must show work to receive credit for this problem)
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0.05n+0.10(2n-5)=0.25
0.05n + 0.2n - 0.5 = 0.25
0.25n = 0.75
n = 3 nickels
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There are only 3 possible combinations:
1 N and 2 D's
or 3 N and 1 D
or 5 N's
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I have 2 coins that total 30 cents.
One of them is not a nickel.  What are they?