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12 February, 23:32

Solve 5x - 6y = - 38

3x + 4y = 0

Choices are:

A) (4,3)

B) (-4,3)

C) (4,-3)

D) (-4,-3)

+3
Answers (1)
  1. 12 February, 23:41
    0
    (-3) * (5 x - 6 y) = (-38) * (-3)

    5 * (3 x + 4 y) = 0 * 5

    You will have

    -15 x + 18 y = 114

    15 x + 20 y = 0

    you add 2 equations together

    You will have

    38 y = 114

    y=3

    Then you chance y = 3 in equation 2, you will have

    3 x + 4 * 3 = 0

    3 x = - 12

    x = - 4

    You have x = - 4 and y = 3

    (-4,3)
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