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2 November, 15:03

The measure of the angles supplement is 30 more than four times that of its complement. Find the measure of the angle described

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  1. 2 November, 15:12
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    1. A+S=180

    2. A+C=90

    and S=30+4C

    Substituting into eq 1

    A + (30+4C) = 180

    3. A+4C=150

    Subtract eq 2 from eq 3

    A + 4C-A-C = 150 - 90

    3C=60

    C=20

    So then

    A+20=90

    A = 70

    70+S=180

    S=110
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