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10 February, 22:45

Find two numbers, if their sum is 93 and their difference is 9.

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Answers (2)
  1. 10 February, 22:56
    0
    42 and 52
  2. 10 February, 23:05
    0
    51 and 42

    Step-by-step explanation:

    Use

    x + y = 93

    x - y = 9

    Add those two equations together and you get 2x = 102

    *y is not in the equation anymore because y + - y = 0*

    Divide both sides by 2

    x = 51

    plug x into one of the equations; let's use x + y = 93

    Then you get, 51 + y = 93

    Subtract both sides by 51 and you get y = 42

    Plug both in the other equation to make sure the numbers work.

    51 + 42 = 93; true

    51 - 42 = 9; true
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