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5 September, 17:30

The sum of five times a number and 6 more than the number is the same as the difference between - 18 and twice the number. What is the number?

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Answers (2)
  1. 5 September, 18:35
    0
    N = - 3

    5n + n + 6 = - 18 - 2n

    6n + 6 = - 18 - 2n

    -6 to both sides

    6n = - 24 - 2n

    +2n to both sides

    8n = - 24

    divide 8 to both sides

    n = - 3
  2. 5 September, 19:06
    0
    5x + (6+x) = - 18 - x

    6x + 6 = - 18 - x

    6x + x = - 18 - 6

    7x = - 24

    x = - 24/7
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