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When seven times a number is added to the square of the number the result is 18. Find the number.

  • Math -

    Let X = the number.
    7X + X^2 = 18
    Rearrange to
    X^2 + 7X -18 = 0
    Solve for X.
    You will get two answers, one positive and one negative. Both will satisfy the equation.

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