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11 October, 10:00

Instructions:Select the correct answer from each drop-down menu. Consider this system of linear equations: 22x - y = - 23 (equation 1) 11x + 12y = 1 (equation 2) To find the value of x, you need to substitute in equation 2. The value of x is.

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  1. 11 October, 11:55
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    The given system of equations is

    22x - y = - 23 (1)

    11x + 12y = 1 (2)

    Write (1) as

    y = 22x + 23 (3)

    Substitute (3) into (2).

    11x + 12 (22x + 23) = 1

    11x + 264x + 276 = 1

    275x = 1 - 276 = - 275

    x = - 1

    From (3), obtain

    y = 22 * (-1) + 23 = 1

    Answer: x = - 1
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