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2 March, 17:19

John saved 65 coins. he saved nickels and dimes only. If the totally $4.90, how many nickels did he have?

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  1. 2 March, 20:45
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    Then N+D=65 the number of coins he has.

    Also 5N + 10D=490 working the amount of money in pennies. Put equation 1 into 2

    5N+10 (65-N) = 490

    5N+650-10N=490

    -5N=-160

    N=32 and D=33

    To check 32 + 33 = 65

    160 + 330 = 490
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