Matematika

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Tolong bantu!!! Yaaaaa bantuuuu
Tolong bantu!!! Yaaaaa bantuuuu

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  • 180° = 39° + 3x + 4x - 6
    180° = 33° + 7x
    147 ° = 7x
    x = 21°
    ABC = 4x - 6
    = 4 . 21 - 6
    = 84 - 6
    = 78° ( C )

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