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26 November, 07:16

Two times a number plus three equals one half of the number plus 12. What is the number?

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Answers (2)
  1. 26 November, 07:21
    0
    First we have to make an equation

    2x+3=1/2x+12

    then solve

    15=-1.5x

    -10=x

    the number is - 10
  2. 26 November, 07:25
    0
    We'll use n as "the number". 2n+3=1/2n+12. Step one is to isolate the variable.

    2n-1/2n is 1.5n.

    1.5n+3=12.

    Subtract 3 from both sides.

    1.5n=9.

    n=6.

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