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12 October, 19:05

A cash register contains 15 coins in nickles and dimes. total value is $1.25. how many coins of each type are there?

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  1. 12 October, 22:48
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    5 nickels and 10 dimes

    Step-by-step explanation:

    d = dimes n=nickels

    d+n=15 125=5n+10d

    d=15-n 125-5n=10d

    Substitute

    125-5n=10 (15-n)

    125-5n=150-10n

    125+5n=150

    5n=25

    n=5

    5 nickels leaving 10 dimes which if you were to solve it out you get the right amount of money
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