One nickel is equivalent to $0.05 and one dime is equivalent to $0.10.Let d - number of dimes and n - number of nickels. It is given that Emilio has 6 more nickels than dimes, thus n = d + 6, and the total value is $2.10.
Hence,
$2.10 = $0.05n + $0.10d$2.10 = $0.05n + $0.10(n - 6).
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