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29 November, 22:16

Substitute for y=4x-1; y=2x-5

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Answers (2)
  1. 30 November, 00:41
    0
    You can say 2x - 5 = 4x - 1 ⇒ 2x - 4x = 5 - 1 ⇒ - 2 x = 4 ⇒ x = - 2 and y gonna be

    y = - 4 - 5 = - 9 : D
  2. 30 November, 01:05
    0
    y=4x-1; y=2x-5

    Step: Solve y=4x-1 for y:

    Step: Substitute 4x-1 for y in y=2x-5:

    y=2x-5

    4x-1=2x-5

    4x-1+-2x=2x-5+-2x (Add - 2x to both sides)

    2x-1=-5

    2x-1+1=-5+1 (Add 1 to both sides)

    2x=-4

    2x/2=-4/2 (Divide both sides by 2)

    x=-2

    Step: Substitute-2 for x in y=4x-1:

    y=4x-1

    y = (4) (-2) - 1

    y=-9 (Simplify both sides of the equation)

    Answer:y=-9 and x=-2
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