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6 November, 16:58

Use the substitution method to solve the system.

{m+n=5m-n=3

What is the solution?

There is no solution.

The solution is (4, 1).

There are an infinite number of solutions.

The solution is (2, - 1).

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Answers (1)
  1. 6 November, 18:17
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    M + n = 5 ... m = 5 - n

    m - n = 3

    5 - n - n = 3

    5 - 2n = 3

    5 - 3 = 2n

    2 = 2n

    2/2 = n

    1 = n

    m - n = 3

    m - 1 = 3

    m = 3 + 1

    m = 4

    solution is (4,1)
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