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    4 = 22

    6 = 2 .3 

    8 = 23

    => BCNN(4;6;8) = 23 . 3 = 8 .3 = 24

    __Good luck__

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    We have : x - 10 + 2 = 20 + 10 

    => x - 10 + 2 = 30 

    => x - 10 = 30 - 2 

    => x - 10 = 28

    => x = 28 + 10 

    => x = 38

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    A) 46 + 17 + 54  =  ( 46 + 54 ) + 17  = 100 + 17 = 117

    B) 4 . 35 . 25  = (4 . 25) . 35 = 100 . 35 = 3500 

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