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13 November, 12:40

An equation in the system is y = x + 1. What is the other equation in the system if the solution is only at (0, 1) ?

x - y = 1

2x + 2y = 4

x + y = 1

x + 2y = 2

+5
Answers (1)
  1. 13 November, 13:05
    0
    A)

    x - y = 1

    0 - 1 = 1

    -1 = 1

    Not true.

    B)

    2x + 2y = 4

    2 (0) + 2 (1) = 4

    0 + 2 = 4

    2 = 4

    Not true

    C)

    x + y = 1

    0 + 1 = 1

    1 = 1

    True

    D)

    x + 2y = 2

    0 + 2 (1) = 2

    2 = 2

    True

    The answer is C and D.
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