Matematika

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  • p = (3x+2)
    l = (2x-1)

    kll persegi panjang = 2(p+l)
    32 = 2(3x+2+2x-1)
    32 = 2(5x+1)
    32 = 10x +2
    32-2 = 10x
    30 = 10x
    x = 30/10
    x = 3

    lebar = 2x-1 = (2.3)-1 = 6-1 = 5cm

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