Matematika

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tolong Di bantu ya ka
tolong Di bantu ya ka

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    21 
    <B1  + <B4  = 180
    78 + 6x = 180
    6x = 102
    x = 17
    <B4 = 6x = 6(17) = 102

    <A 4 = <B4
    3y = 102
    y = 34

    x + y = 17 + 34 = 51 


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