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8 July, 03:50

A person has 20 coins, all nickels and dimes, worth one dollar and 40 cents. How many nickels are there?

If n = number of nickels and d = number of dimes, which system of equations represents the problem?

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  1. 8 July, 05:05
    0
    Is there one that looks like

    /[n+d=20//

    5n+10d=140/]
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