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11 August, 07:59

Angle A is 21 less than twice as large as its supplement, Angle B

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  1. 11 August, 08:11
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    B=180-A and A=2B-21

    A=180-B and A=2B-21

    180-B=2B-21

    201=3B

    B=67, then A=180-67=113 so

    A=113 and B=67
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