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9 July, 06:00

1) 2x + y = 4

3x + 2y = 1

2) x - 9 = 3y

X + 2y = - 1

+2
Answers (1)
  1. 9 July, 09:30
    0
    1) y=4-2x

    3x+2 (4-2x) = 1

    3x+8-4x=1

    -x=-7

    x=7

    14+y=4

    y=-10

    (7,-10)

    2) x=3y+9

    3y+9+2y=-1

    5y+9=-1

    5y=-10

    y=-2

    x+2 (-2) = - 1

    x-4=-1

    x=3

    (3,-2)
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