6÷2(1+2) = x Solve for x

Discussion in 'Sidewinders Bar & Grille' started by PCollen, Aug 14, 2021.

6÷2(1+2) = x Solve for x

Poll closed Aug 16, 2021.
  1. 1

    45.1%
  2. 9

    54.9%
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  1. Old Guy

    Old Guy Strat-Talker

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    You lost me at 576,848,443,079,476.
     
  2. Ruscio

    Ruscio Senior Stratmaster Gold Supporting Member Silver Member

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    I'm really late to this, but I think the poll demonstrates pretty nicely that the expression, as written, can't be evaluated. It's ambiguous, easily misread as either:

    a. (6 / 2) * (1 + 2)
    b. 6 / (2 * [1 + 2])

    Whenever reasonable people may disagree about order of operations, it should be written more clearly; in this case, as either (a), (b), or something equally clear. I'd be surprised if reputable technical sources allowed such an ambiguous expression. I write stats papers for academic journals and I'm very confident that this would require clarification prior to publication. I guess it makes for fun on the internet, though, where arguments breeds views, comments, and the other metrics that generate attention and ad revenues.
     
  3. tubedude

    tubedude Strat-Talker

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    O
    Of course there's a counter argument. There's always a counter argument. Are you new here?
     
  4. CB91710

    CB91710 No GAS shortage here Double Platinum Supporting Member

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    And given that parens are not specified around the 2nd group as in example B, the correct order of operations for the two operations of equal priority is left to right.
    So as written, (A) would be a more clear (but redundant) way to represent it.
     
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  5. circles

    circles Resident Pinball Enthusiast

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  6. stratocarlster

    stratocarlster Most Honored Senior Member

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    That's how I see it. You just can't mess with the rule that 2(1+2) = 6
    That trumps the PEMDAS 'rule' (which is just a convention).
    But as Ruscio said, the real answer is, we're all being played. The expression is deliberately flawed; designed to create an argument.
     
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  7. Jon21

    Jon21 Strat-Talk Member

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    this is correct and the only way to do this is how you’ve done it.

    answer can only be x=1

    I tested this with my degree level maths tutor also and its 1 all day long :)
     
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  8. Acquiesce34

    Acquiesce34 Strat-Talk Member

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    The answer is 9 if you follow order of operations. Brackets first, then division, then multiplication.
     
  9. RobJolley

    RobJolley New Member!

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    It's 1, a computer say C or Python will do it left to right but that would na bád programming. Inside bracket then muiplication then division. If I were putting it in a program I'd write it 6/(2*(1+2)) to make it explicit. If your of the opinion a compiler takes precedence into account properly you'd be greatly mistaken
     
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  10. daisie

    daisie Strat-Talk Member

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    I'm not reading through nine pages of answers.
    But this is basic math.

    Even with order of operations asking you to do parentheses first, then working left to right, it is super simple and basic.

    The answer is 9.

    Let it go, guys.
     
  11. gitapik

    gitapik Strat-Talker

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    Lots of people look at it that way, but that’s actually “Arithmetic”. Mathematics (Math) is the application of those (and other) skills.

    I taught grades K-8 for 27 years. Old, new, and newer math skills were part of the drill. My kids’ friends would come over to do their homework with me because the parents didn’t understand the new methods.

    The answer to that equation is “x=9”.
     
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  12. Buzzgrowl

    Buzzgrowl Strat-Talker

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    It's 1.

    2(1+2) is a specific number expressed in a particular way. There are no operations in it, just a way of writting it out. Like a(b+a).
     
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  13. heltershelton

    heltershelton Vivamus libero Vivamus duris

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    the answer is 9 and if you say its 1 then you are wrong.
    not because of any math rules or anything like that, but because i said so.
    NINE.....FINAL ANSWER
     
  14. harvey1954

    harvey1954 Strat-Talk Member

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    PEMDAS is also known as Please Excuse My Dear Aunt Sally. It is the order of operations. You start with anything in parentheses no matter where is within the number sentence. So you add 1 and 2 to get 3: 6÷2(3) = x Next is E for exponents, but there are none in this case. So we go onto M & D. The rule is starting on the left you do whatever multiplication or division problem you come across first. In this case it would be division: 6÷2 = 3(3) = x. The last thing you do is multiply 3 times 3 which gives you 9. x = 9. Normally you'd do any addition or subtraction last, but there is none in this problem.
    6÷2(1+2) = x
     
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  15. henderman

    henderman Dr. Stratster

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    it's 9 - learned that stuff in 6th or 7th grade.

    what i now learn everyday is the average american does not understand 6th grade math, 6th grade science or even basic english.
     
  16. scotjudy

    scotjudy Strat-Talk Member

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  17. stratocarlster

    stratocarlster Most Honored Senior Member

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    Finally someone to explain the answer, where have you been?
     
  18. scotjudy

    scotjudy Strat-Talk Member

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    M is before D
     
  19. Rev766

    Rev766 New Member!

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    You’ll never be able to do any complex electrical work, or even halfway advanced guitar wiring setups, for that matter, with that limitation on yourself.
     
  20. TOL-STRAT

    TOL-STRAT Strat-Talk Member

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    Problem solved!
     
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