Reply To: i need help on how to solve this problem

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    D2

    Member
    December 20, 2022 at 9:02 am

    a – 20 = b + 20… 1

    2(b – 22) = a + 22… 2

    We can juggle those around for

    a = b +40 and

    2b – 44 = a + 22 so 2b – 66 = a

    The equations are now:

    a = b + 40 and

    a = 2b – 66

    ELIMINATION METHOD:

    b + 40 = 2b – 66 so 40 = b – 66 making b = 106.

    Plug b = 106 into new equations 1 and 2 for:

    a = 106 + 40 (new equation 1) and

    a = 212 – 66 (new equation 2)

    This gives a = 146 and b = 106

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