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jigglyjello Group Title

|x+5|=3x-7 solve

  • 2 years ago
  • 2 years ago

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  1. allank Group Title
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    Hint: If |a|=b then a=b a=-b

    • 2 years ago
  2. allank Group Title
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    Can you take it from there @jigglyjello ?

    • 2 years ago
  3. zscdragon Group Title
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    x+5 = 3x-7 x=6 OR x+5 = -3x+7 x=0.5

    • 2 years ago
  4. Zarkon Group Title
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    just 6

    • 2 years ago
  5. jigglyjello Group Title
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    ok thank you

    • 2 years ago
  6. colorful Group Title
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    @Zarkon why is it just 6 ?

    • 2 years ago
  7. Zarkon Group Title
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    plug in .5 into the above equation...does it work...

    • 2 years ago
  8. colorful Group Title
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    @Zarkon but what's the flaw in the logic behind just doing\[|x|=a\implies x=a\vee x=-a;~~a\ge0\]

    • 2 years ago
  9. Zarkon Group Title
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    and what happens when \(a<0\)

    • 2 years ago
  10. colorful Group Title
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    oh! I see, it is a<0 for the other soln! Hail Zarkon!

    • 2 years ago
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