besar <ABD = ... tolong dijawab pakai cara ya terima kasih

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  • < ABD = < BDE (berseberangan dalam)

    3x + 5 = 4x - 10
    3x - 4x = -10 - 5
    -x = -15
    x = 15

    < ABD = 3x + 5
    = 3(15) + 5
    = 50°

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