Matematika

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tolong ya ka dijawab :):)
tolong ya ka dijawab :):)

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  • jawab

    A = B

    2a + b = 5.....kali 2
    4a - b = 7


    4a + 2b = 10
    4a - b = 7
    ...................(-)
    3b = 3
    b = 1

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