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16 December, 06:07

What is the solution to the system of equations below?

Negative 4 x + 6 y = negative 18 and y = negative 2 x + 21

(9, 3)

(3, 9)

(-9, - 9)

(-9, 9)

+5
Answers (2)
  1. 16 December, 06:37
    0
    solution: (9, 3), x = 9, y = 3

    Step-by-step explanation:

    Negative 4 x + 6 y = negative 18 and y = negative 2 x + 21

    convert to algebra.

    - 4x + 6y = - 18;

    y = - 2x + 21;

    let us solve this with elimination

    change - 4x + 6y = - 18 to - 2x + 3y = - 9

    get: - 2x + 3y = - 9

    and 2x + y = 21

    add.

    -2x + 2x + 3y + y = - 9 + 21

    4y = 12

    y = 3

    2x + (3) = 21

    2x = 18

    x = 9

    (9, 3)
  2. 16 December, 09:43
    0
    A. (9,3)
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