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10 January, 01:28

5. Louis has 21 coins in his pouch, how many nickels and

dimes does he have if he has $1.35?

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  1. 10 January, 04:56
    0
    N + d = 21

    0.5n + 0.10d = 1.35

    5n + 10d = 135

    d = 21-n

    5n + 210 - 10n = 135

    -5n = - 75

    n = 15

    d = 6
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