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27 April, 14:35

Solve the system of equations for the variables: 5x+2y=13 x+2y=9

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Answers (2)
  1. 27 April, 14:49
    0
    x = 1

    y = 4

    Step-by-step explanation:

    5x + 2y = 13

    x + 2y = 9

    Add both equations.

    6x + 4y = 22

    Solve for x.

    6x = 22 - 4y

    x = 22/6 - 4/6y

    Put x as 22/6 - 4/6y in the second equation and solve for y.

    22/6 - 4/6y + 2y = 9

    -4/6y + 2y = 9 - 22/6

    4/3y = 16/3

    y = 16/3 * 3/4

    y = 48/12

    y = 4

    Put y as 4 in the first equation and solve for x.

    5x + 2 (4) = 13

    5x + 8 = 13

    5x = 13 - 8

    5x = 5

    x = 5/5

    x = 1
  2. 27 April, 14:53
    0
    x = 1, y = 4

    Step-by-step explanation:

    5x+2y = 13

    x+2y = 9

    Subtracting both equations

    => 5x+2y-x-2y = 13-9

    => 4x = 4

    => x = 1

    Now, Putting x = 1 in the first equation

    => 5 (1) + 2y = 13

    => 2y = 13-5

    => 2y = 8

    => y = 4
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