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14 October, 06:05

Use the substitution method to solve the following system of equations:

4x - y = 3

7x - 9y = - 2

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Answers (1)
  1. 14 October, 06:30
    0
    Using the first equation:

    4x = y + 3 - - - > y = 4x - 3

    We then substitute this into the second equation:

    7x - 9 (4x-3) = - 2 - - - > 7x - 9x + 27 = - 2 - - - > - 2x = - 29 - - - > x = 14.5
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