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28 November, 16:53

4 times the quantity of a number decreased by one is the same as two more than the same number. Find the number

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  1. 28 November, 17:13
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    The hard part is just making sense of what they are asking for.

    4 times the quantity of a number decreased by one is just the expression:

    4 * (x-1)

    Where "x" is our mystery number.

    Two more than the same number is just:

    x + 2

    Where "x" is our same mystery number.

    They say that these two expressions are the same, so just set them equal to each other.

    4 * (x-1) = x+2

    4x - 4 = x + 2

    3x - 4 = 2

    3x = 6

    x = 2

    The mystery number is 2. Plug in 2 and you will see that it works!
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