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30 June, 09:43

Which ordered pair is a solution for 2x+5y=-11

10x+3y=11

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Answers (1)
  1. 30 June, 10:02
    0
    X = 2 and Y = - 3

    Step-by-step explanation:

    2x+5y=-11 - equation 1

    10x+3y=11 - equation 2

    from equation 1, 2X = - 11 - 5y

    X = - 11/2 - 5Y/2

    X = - 5.5 - 2.5Y

    insert X = - 5.5 - 2.5Y into equation 2

    therefore, 10x+3y=11

    10 (-5.5 - 2.5Y) + 3y = 11

    -55 - 25Y + 3Y = 11

    -22Y = 11+55

    Y = - 66/22

    Y = - 3

    insert Y = - 3 into equation 1

    thus 2x + 5 (-3) = - 11

    2x - 15 = - 11

    2x = - 11 + 15

    2x = 4

    x = 4/2

    x = 2

    ordered pair: X = 2 and Y = - 3
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