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7 August, 16:13

Solve.

{y=x-7

{5x+2y=7

Use the substitution method.

A. (-1, - 8)

B. (0, - 7)

C. (7, 0)

D. (3, - 4)

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Answers (1)
  1. 7 August, 16:38
    0
    The answer would be D. (3, - 4).

    Work:

    3 = x

    -4 = y

    3 • 5 = 15

    -4 • 2 = - 8

    15 + - 8 = 7

    To check: y = x - 7

    -4 = 3 - 7

    3 - 7 = - 4
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