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9 October, 12:39

X = y - 3

X + 3y = 13

What is the solution to the system of equations?

A) (1,4)

B) (4,1)

C) (7,4)

D) (2.5,5.5)

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Answers (1)
  1. 9 October, 15:17
    0
    X = y - 3

    x + 3y = 13

    x + 3y = 13 (replace x with y-3)

    y - 3 + 3y = 13

    4y - 3 = 13

    4y = 13 + 3

    4y = 16

    y = 16/4

    y = 4

    x = y - 3

    x = 4 - 3

    x = 1

    The answer is A. (1,4)
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