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28 October, 23:02

Sue has $2.20 in dimes and nickels. If she has 13 more dimes than nickels, how many of each coin does she have?

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  1. 29 October, 00:20
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    10d+5n=220

    divide both sides by 5

    2d+n=44

    d=13+n

    sub 13+n for d in other equatin

    2 (13+n) + n=44

    26+2n+n=44

    26+3n=44

    minus 26 both sides

    3n=18

    divide both sides by 3

    n=6

    sub back

    d=13+n

    d=13+6

    d=19

    19 dimes

    6 nickles
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