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24 January, 08:37

Using Cramer's Rule, what is the value of x in the solution to the system of equations below?

-X-3y = - 3

-2x-5y=-8

+1
Answers (2)
  1. 24 January, 09:55
    0
    Answer: X=9 AND Y = - 2

    Step-by-step explanation:

    Step: Solve-x-3y=-3for x:

    -x-3y=-3

    -x-3y+3y=-3+3y (Add 3y to both sides)

    -x=3y-3

    -x

    -1

    =

    3y-3

    -1

    (Divide both sides by - 1)

    x=-3y+3

    Step: Substitute-3y+3forxin-2x-5y=-8:

    -2x-5y=-8

    -2 (-3y+3) - 5y=-8

    y-6=-8 (Simplify both sides of the equation)

    y-6+6=-8+6 (Add 6 to both sides)

    y=-2

    Step: Substitute-2foryinx=-3y+3:

    x=-3y+3

    x = (-3) (-2) + 3

    x=9 (Simplify both sides of the equation)
  2. 24 January, 10:13
    0
    The answer is : X=9 y=-2
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