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4 July, 09:12

Solve the system of equations.

2x + 3y = 6

x + 4y = - 2

x = 0, y = 2

x = 6, y = - 2

x = 2, y = - 1

x = 3, y = 0

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Answers (2)
  1. 4 July, 09:36
    0
    2*0+3*2 = 6

    0+6=6

    6=6

    so x=0, y=2 is right for first equation
  2. 4 July, 09:42
    0
    2x+3y=6

    X+4y=-2

    You have to make the x have the same numbers, so you have to multiply by the opposite. This means; 1 (2x+3y=6)

    2 (x+4y=-2)

    2x+3y=6 2x+8y=-4

    Now subtract inorder to have y only.

    2x-2x=0 3y - (+8) = -5y 6 - (-4) = 10

    -5y=10

    -y=2

    Y=-2

    To find x, substitute y in any of the first equations given

    2x+3 (-2) = 6

    2x-6=6

    2x=6+6

    2x=12

    X=6

    Y=-2 X=6

    To see if I am correct, substitute x and y in any of the first equations

    X+4y=-2

    6+4 (-2) = -2

    6-8=-2

    -2=-2

    Substitute in the other equation also to be sure.
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