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3 July, 06:03

Solve the system by substitution.

-6x+8y=-18

3x=y

+2
Answers (2)
  1. 3 July, 07:41
    0
    Answer: (-1,-3)

    Step-by-step explanation:Solve for the first variable in one of the equations, then substitute the result into the other equation.
  2. 3 July, 08:26
    0
    x = - 1, y = - 3

    Step-by-step explanation:

    -6x + 8y = - 18 (1)

    3x = y (2)

    From equation 2,

    y = 3x

    Now, substitute the value of y into equation 1 as shown below:

    -6x + 8y = - 18

    -6x + 8 (3x) = - 18

    -6x + 24x = - 18

    18x = - 18

    Divide both side by the coefficient of x i. e 18

    x = - 18/18

    x = - 1

    Substitute the value of x into equation 2 as shown below:

    y = 3x

    y = 3 (-1)

    y = - 3

    Therefore, x = - 1, y = - 3
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