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anonymous

  • one year ago

for the equation |-1 + x| = 5 would the answer be four or six? I can't figure it out.

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  1. welshfella
    • one year ago
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    the vertical lines around the left side of the equation mean the absolute value - that means the positive value is taken even if the inside part is negative

  2. welshfella
    • one year ago
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    so we write 2 equations -1 + x = 5 and -1 + x = -5 solve these 2 for x

  3. anonymous
    • one year ago
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    @welshfella I know! I got 4 from that but my friend whose on the same lesson said it was 6 so i'm slightly confused

  4. welshfella
    • one year ago
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    there are 2 solutions -1 + x = 5 gives x = 6 and -x + 1 = -5 gives x = -4

  5. welshfella
    • one year ago
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    sorry the last ones is wron -x + 1 = -5 -x = -4 x = 4

  6. welshfella
    • one year ago
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    so the 2 solutions are 4 and 6

  7. Rizags
    • one year ago
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    i believe its -4, 6

  8. anonymous
    • one year ago
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    should i put both as an answer then?

  9. myininaya
    • one year ago
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    yes -1+x=-5 should give x=-5+1

  10. Rizags
    • one year ago
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    both are correct

  11. welshfella
    • one year ago
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    yes - i made a typo when i wrote the second equation down

  12. myininaya
    • one year ago
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    |-1+x|=5 gives -1+x=5 or -1+x=-5

  13. welshfella
    • one year ago
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    yes i wrote -x + 1 = -5 instead of -1 + x = -5

  14. welshfella
    • one year ago
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    -4 , 6 is correct

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