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8 November, 06:20

Use the matrix to solve the system of equations

5x-4y=28

7x+5y=18

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Answers (1)
  1. 8 November, 08:53
    0
    Okay so I wont be able to show the row here but I will try my best.

    7 (5x-4y=28) = 35x-28y=196

    -5 (7x+5y=18) = - 35x-25y=-90

    = - 53y=106

    = y=-2

    5x-4 (-2) = 28

    5x+8=28

    5x=20

    x=4
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