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2 January, 17:00

Solve, using the substitution method.

5x + 2y = 7

y = x - 7

A. (7, 0)

B. (3, - 4)

C, (0, - 7)

D. (-1, - 8)

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Answers (1)
  1. 2 January, 17:25
    0
    5x+2y=7

    y=x-7

    5x=7-2y

    5x=7-2 (x-7)

    5x=7-2x+14

    5x+2x=7+14

    7x/7=21/7

    x=3

    y=x-7

    y=3-7

    y=-4

    Answer is B
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