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21 January, 03:44

A jar contains n nickels and d dimes. There is a total of 200 coins in the jar. The value of the coins is $14.00. how many dimes are in the jar

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  1. 21 January, 03:49
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    There are total 80 dimes in the jar. B/c ...

    n+d=200 = n=200-d

    0.05n+0.1d=$14.00

    0.05 (200-d) + 0.1d=$14.00

    10-0.05d+0.1d=$14.00

    10+0.05d=$14.00

    -10 - 10

    0.05d=$4.00

    0.05d/0.05=$4.00/0.05

    d=80
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