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25 September, 15:27

3y = - x+11

2x+4y = 14

Solve the system.

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Answers (2)
  1. 25 September, 16:38
    0
    x = - 1

    y = 4

    Step-by-step explanation:

    3y = - x + 11

    2x + 4y = 14

    Rearrange equation 1

    It becomes

    x + 3y = 11

    2x + 4y = 14

    Multiply equation 1 by 4 and equation 2 by 3

    We have

    4x + 12y = 44

    6x + 12y = 42

    Subtract equation 2 from one

    We have

    -2x = 2

    Divide both sides by-2

    x = - 2/2

    x = - 1

    Now substitute-1 for x in any of the equations to get y.

    Using equation 1, we have

    -1 + 3y = 11

    Add 1 to both sides of the equation

    -1 + 1 + 3y = 11 + 1

    3y = 12

    Divide both sides by 3

    3y/3 = 12/3

    y = 4
  2. 25 September, 18:48
    0
    x = - 1 and y = 4

    Step-by-step explanation:

    Step 1: Solve 3y = - x + 11 for x

    3y + x = - x + 11 + x

    x + 3y = 11

    x + 3y - 3y = 11 - 3y

    x = - 3y + 11

    Step 2: Substitute - 3y + 11 for x in 2x + 4y = 14

    2 (-3y + 11) + 4y = 14

    Simplify both sides of the equation, and you get - 2y + 22 = 14

    -2y + 22 - 22 = 14 - 22

    -2y = - 8

    -2y/-2 = - 8/-2

    y = 4

    Step 3: Substitute 4 for y in x = - 3y + 11

    x = - 3 (4) + 11

    Simplify both sides of the equation, and you get x = - 1
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