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8 March, 02:45

9. 2x - 3y = 21

y=3-x

+1
Answers (1)
  1. 8 March, 03:00
    0
    Answer: (6,-3)

    Explanation:

    (1) 2 x-3y=21

    (2) y = 3 - x

    Substituting eq 2 in eq 1

    2 x - 3 (3-x) = 21

    2 x-9+3x=21

    5 x - 9 = 21

    5 x = 30

    x = 6

    Put x = 6 in eq 2 we get,

    y = 3 - 6

    y = - 3

    Solution : (6, - 3)
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