Ask Question
2 July, 02:56

George starts with a number. He takes away 7, then squares it, adds 6, subtracts 13, multiplies it by 4 and subtracts 1.

He ends up with 7.

What was George's original number?

+5
Answers (1)
  1. 2 July, 04:38
    0
    10 or 4.

    Step-by-step explanation:

    [ (x - 7) ^2 + 6 - 13 ] * 4 - 1 = 7

    (x^2 - 14x + 49 - 7) * 4 - 1 = 7

    4x^2 - 56x + 196 - 28 - 1 - 7 = 0

    4x^2 - 56x + 160 = 0

    4 (x^2 - 14x + 40) = 0

    (x - 10) (x - 4) = 0

    x = 10, 4
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “George starts with a number. He takes away 7, then squares it, adds 6, subtracts 13, multiplies it by 4 and subtracts 1. He ends up with 7. ...” in 📘 Mathematics if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers