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27 January, 20:48

2 is added to twice a certain number and the sum is doubled. the result is 10 less than 5 times the original number

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Answers (2)
  1. 27 January, 23:47
    0
    14

    Step-by-step explanation:

    2 (2n + 2) = 5n - 10

    4n + 4 = 5n - 10

    n=14
  2. 27 January, 23:56
    0
    2 is added to twice a certain number and the sum is doubled. The original number is 14

    Solution:

    Let x be the original number

    Given that the 2 is added to twice of x. This can be represented as (2 + 2x)

    Now it is given that the sum is doubled which means 2 (2 + 2x)

    The result is 10 less than 5 times the original number "x" which means 2 (2 + 2x) = 5x - 10

    The above expression is solved to get the value of original number

    2 (2 + 2x) = 5x - 10

    4 + 4x = 5x - 10

    On rewriting the above expression, we get

    5x - 10 - 4 - 4x = 0

    x - 14 = 0

    x = 14

    Hence the original number is 14
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