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24 February, 09:10

There is a number written on the board. One student increased the number by 23, but another student decreased the same number by 1. The first student's result was 7 times greater than the result of the second student. What is the number written on the board?

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Answers (2)
  1. 24 February, 11:25
    0
    5

    Step-by-step explanation:

    let the number = x

    x+23=7 (x-1)

    x+23=7x-7

    7x-x=23+7

    6x=30

    x=30/6=5
  2. 24 February, 12:00
    0
    5

    Step-by-step explanation:

    Let's call the original number x.

    So, the first student did x+23, and the other student did x-1.

    You know that the first students result was 7 times larger than the other students. So, you can make the equation:

    x+23=7 (x-1)

    x+23=7x-7

    Then, do the algebra

    -6x=-30

    x=5
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