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math

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How would you solve this problem??

A piggy bank contains only nickels and dimes. In all there are 42 coins with a total value of $3.85. How many nickels are in the piggy bank??

  • math -

    two equations
    : n+d=42
    .05n+.10d=3.85 or 5n+10d=385

  • math -

    Sorry forgot to post the answers, which one would it be??
    And can you show how you solved it??

    A-3
    B-7
    C-17
    D-35

    Thanks

  • math -

    Ok I got it. Its process of elimination. So it would be B-7.

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