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25 September, 20:00

Y=-5

5x+4y=-20

it say solve by substitution

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Answers (2)
  1. 25 September, 21:17
    0
    Y = - 5

    5x + 4y = - 20

    5x + 4y = - 20

    5x + 4 (-5) = - 20

    5x - 20 = - 20

    + 20 + 20

    5x = 0

    5 5

    x = 0

    (x, y) = (0, - 5)
  2. 25 September, 22:19
    0
    Y=-5

    5x+4y=-20

    Substitute y into the equation.

    5x + 4 (-5) = - 20

    5x + - 20 = - 20

    +20 + 20

    5x = 0

    x = 0

    Now we have our values.

    Answer: y = - 5 and x = 0
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