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2 January, 08:35

Solving system by elimination

7x+2y=24

8x+2y=30

+1
Answers (2)
  1. 2 January, 08:43
    0
    7x+2y=24

    -8x-2y=-30

    -x=-6

    x=6

    7 (6) + 2y=24

    42+2y=24

    2y=-18

    y=-9
  2. 2 January, 08:47
    0
    7x+2y=24

    -8x-2y=-30 (multiplied each side by - 1)

    -x = - 6

    x = 6

    7x+2y=24

    7 (6) + 2y=24

    42+2y=24

    2y = - 18

    y = - 9
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