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19 July, 21:14

A Midwestern competition awarded 38 ribbons. The number of blue ribbons was 1 less than the number of white ribbons. The number of red ribbons was 3 more than the number of white ribbons. How many of each kind of ribbons was awrded?

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  1. 19 July, 21:46
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    There are 12 white ribbons, 15 red ribbons, and 11 blue ribbons.

    38 = (w-1) + (w+3) + w

    combine like terms

    38=2+3w

    subtract 2 from both sides

    36=3w

    divide 3 on both sides

    12=w

    w-1=b

    12-1=b

    11=b

    w+3=r

    12+3=r

    15=r

    Check Your Work

    w+r+b=38

    15+11+12=38

    38=38
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