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3 May, 11:51

Eliminate

4s+t=9

3s-2t=4

+1
Answers (1)
  1. 3 May, 12:20
    0
    4s + 1t = 9 ⇒ 12s + 3t = 27

    3s - 2t = 4 ⇒ 12s - 8t = 16

    11t = 11

    11 11

    t = 1

    4s + 1 = 9

    - 1 - 1

    4s = 8

    4 4

    s = 2

    (s, t) = (2, 1)
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