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26 September, 21:13

Solve the following system:

y = x + 3

3x + y = 19

A (4, - 7)

B (4, 7)

C (-4, 7)

D (7, 4)

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Answers (1)
  1. 26 September, 21:14
    0
    Y = x + 3 ... so sub in x + 3 for y in the other equation

    3x + y = 19

    3x + x + 3 = 19

    4x + 3 = 19

    4x = 19 - 3

    4x = 16

    x = 16/4

    x = 4

    y = x + 3

    y = 4 + 3

    y = 7

    so ur solution is (4,7) <==
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