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8 October, 14:03

For ∆ABC, m∠A = (2x+3) °, m∠B = (x+5) °, and m∠C = (3x+4) °. What is the measure of angle A?

How do you find x?

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  1. 8 October, 16:13
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    m∠A + m∠B + m∠C = 180

    2x+3 + x + 5 + 3x + 4 = 180

    6x + 12 = 180

    6x = 180 - 12

    6x = 168

    x = 168/6

    x = 28

    m∠A = (2x+3) = 2 (28) + 3 = 56 + 3 = 59
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