Matematika

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No 18 ...............
No 18 ...............

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  • (4x+10) + (5x-30) + (6x-40) 
    180 = 15x - 60 
    240 = 15x
    x = 16

    ∠A = (4x+10) = 74
    ∠B = (5x-30) = 50
    ∠C = (6x-40) = 56

    semoga dapat membantu

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