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24 June, 16:23

Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar (s). Consider this system of equations: x + 2y = - 13 12x + 5y = - 4 The solution of this system of equations is (,).

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  1. 24 June, 18:46
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    The solution of this system of equation is (3, - 8)

    Step-by-step explanation:

    1. Let's solve the system of equations:

    First equation:

    x + 2y = - 13

    x = - 13 - 2y

    Second equation:

    12x + 5y = - 4

    12 * ( - 13 - 2y) + 5y = - 4 (Replacing x with - 13 - 2y)

    -156 - 24y + 5y = - 4

    -24y + 5y = - 4 + 156 (Like terms)

    -19y = 152

    y = - 152/19

    y = - 8 (Dividing by 19)

    Solving x

    x + 2y = - 13

    x + 2 ( - 8) = - 13

    x - 16 = - 13

    x = - 13 + 16

    x = 3

    2. Proving that x = 3 and y = - 8 are correct:

    12x + 5y = - 4

    12 * 3 + 5 * - 8 = - 4

    36 - 40 = - 4

    - 4 = - 4

    We proved that x = 3 and y = - 8 are correct
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