<PRE><B>Question 1118115</B>
Dan has the same number of nickels and dimes in his piggy bank. if the total of amount of those coins is $0.90, how many of each coin does he have ? 
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n - d = 0
5n+10d = 90
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n-d = 0
n+2d = 18
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Subtract and solve for &quot;d&quot;:
3d = 18
d = 6 (# of dimes)
n = d = 6 (# of nickels)
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Cheers,
Stan H.
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