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12 November, 10:31

8) Solve the following system by the substitution method. Check the solution (s).

6x + 7y = 3

x + y = 1

+5
Answers (2)
  1. 12 November, 10:33
    0
    (-1) 6x + 7y = 3

    (6) x + y = 1

    -6x - 7y = - 3

    6x + 6y = 6

    -1y = - 3

    divide both by - 1

    y = 3

    then

    6x + 7 (3) = 3

    6x + 21 = 3

    6x = - 18

    divide both by 6

    which equals x = - 3
  2. 12 November, 10:46
    0
    x = 4

    y = - 3
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