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6 September, 02:22

Find x and y

x+y=5

x=y+7

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Answers (1)
  1. 6 September, 02:36
    0
    1st equation: x + y = 5

    2nd equation: x = y + 7

    replace x in 1st with 2nd

    y + 7 + y = 5

    2y+7 = 5

    2y = - 2

    y = - 1

    now replace y in 2nd with - 1

    x = - 1 + 7

    x = 6

    answer:

    x = 6

    y = - 1
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