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9 August, 03:05

Solve the system of equations x+4y=-3 - 4*+y=-5

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Answers (1)
  1. 9 August, 05:50
    0
    x=1 and y=-1

    Step-by-step explanation:

    So, for this systems of equation, I'm using the substitution method.

    x+4y=-3 and - 4x+y=-5

    Step: Solve x+4y = -3 for x:

    x+4y + -4y = -3+-4y (Add - 4y to both sides)

    x=-4y-3

    Step: Substitute-4y-3 for x in - 4x+y=-5:

    -4x + y = -5

    -4 (-4y-3) + y=-5

    17y + 12=-5 (Simplify both sides of the equation)

    17y + 12+-12=-5+-12 (Add - 12 to both sides)

    17y = -17

    17y

    17

    =

    -17

    17

    (Divide both sides by 17)

    y=-1

    Step: Substitute-1 for y in x=-4y-3:

    x=-4y-3

    x = (-4) (-1) - 3

    x=1 (Simplify both sides of the equation)
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