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algebra

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2(a-4)+15=13

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  • algebra - ,

    2(a-4)=-2
    a-4=-1
    a=3

  • algebra - ,

    2(a-4)+15=13

    2a - 8 + 15 = 13

    2a + 7 = 13

    2a + 7 - 7 = 13 - 7

    2a = 6

    a = 6/2

    a = 3

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