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16 September, 03:18

Solve the system of equations algebraically.

3x - 3y = - 9

2x + y = - 3

+3
Answers (1)
  1. 16 September, 03:44
    0
    x = 1/3

    x = - 5/3

    Step-by-step explanation:

    multiply second equation by 3

    3 * (2x+y) = - 3 ➡ 6x+3y = - 6 then add it to first equation

    3x - 3y + 6x + 3y = - 9-6 ➡9x = - 15 ➡x = - 5/3

    use this to find value of y

    2 * (-5/3) + y = - 3 ➡ - 10/3 + y = - 3 ➡ y = - 3 + 10/3 ➡ y = 1/3
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