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college math 209

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find the values for x and y

4x - 9= -15
-3x - 4y = 22

  • college math 209 -

    Eq1: 4X - 9 = -15

    Eq2: 3X - 4Y = 22.

    Solve for X in Eq1:
    4X - 9 = -15,
    4X = -15 + 9,
    4X = -6,
    X = -6/4 = -(3/2).
    Substitute -3/2 for X in Eq2:
    3(-3/2) - 4Y = 22,
    -(9/2) - 4Y = 22,
    Multiply both sides by 2:
    -9 - 8Y = 44,
    -8Y = 44 + 9 = 53,
    Y = -(53/8).

    You show only 1 variable in Eq1; i
    assumed that is correct.

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