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1 April, 18:58

3. Find a solution to the following system of equations.

-3x + 3y = - 9

-3x + y = 7

+2
Answers (1)
  1. 1 April, 20:31
    0
    x = 5

    y = 2

    Step-by-step explanation:

    -3x + 3y = - 9

    3y = 3x - 9

    Equation 1. y = x - 3

    -3x + y = 7

    Equation 2. y = 3x + 7

    So, put number 1 equation to number 2's y:

    x - 3 = 3x + 7

    x - 3x = 7 + 3

    -2x = 10

    2x = 10

    x = 10/2

    x = 5

    And, put x, which is 5, to the any equation to figure out the y.

    This time, I'll use equation number 1.

    y = 5 - 3

    y = 2
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