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13 October, 05:42

Y=-2x-5

y=4x+1

How many solutions?

Math Not Geography Sorry.

+2
Answers (1)
  1. 13 October, 08:35
    0
    y = - 2x - 5

    y = 4x + 1

    This equation has one solution. y = - 3 and x = - 1.

    y=-2x-5

    substitute - 2x - 5 for y in y = 4x + 1:

    y = 4x + 1

    -2x - 5 = 4x + 1

    -2x - 5 + - 4x = 4x + 1 + - 4x

    -6x - 5 = 1

    -6x - 5 + 5 = 1 + 5

    -6x = 6

    (Divide both sides by - 6)

    x = - 1

    substitute - 1 for x in y = - 2x - 5

    y = - 2x - 5

    y = (-2) (-1) - 5

    y = - 3
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