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48÷2(9+3)=?


Casper

48÷2(9+3)=?  

170 members have voted

  1. 1. 48÷2(9+3)=?

    • 2
      82
    • 288
      88


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  • 1 month later...
48/2*(9+3)=X solve for X

48/2=X/(9+3)

48/2=X/12

Cross multiply:

576=2X

576/2=X

288=X

:beathorse:

Finally, someone sees my point... the * is not there!!! If it were, then the above logic would be correct.

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Finally, someone sees my point... the * is not there!!! If it were, then the above logic would be correct.

PEMDAS

you must work left to right once the parenthesis are equated.

48/2 and THEN 24*12 [or (48/2)*12]

NOT

2*12 THEN 48/24 [or 48/(2*12)]

(Which is right to left)

Either way you look at it there IS a * after the 2!

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Every trig equation I have ever done has been solved using same method as I used to come up with 2. And guess wat my angles are ALWAYS RIGHT. And I've got 25 years machining experience

You used trig to come up with your answer?? :wtf:

I dont see any COS, CSC, TAN etc. involved here.

Straight PEMDAS and left-to-right. Plain and simple.

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Holy fuck still going!. 288 is the correct answer.

48/2(9+3)

48/2(12)

24(12)

288

At no point is there an exponent. If there was it would be an entirely different answer. 12 to the second power is 144. 2 to the 12th I cannot do in my head.

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Every trig equation I have ever done has been solved using same method as I used to come up with 2. And guess wat my angles are ALWAYS RIGHT. And I've got 25 years machining experience
The order of operations do not change between trigonometry, calculus, algebra, geometry, machining, engineering, computer science, etc. It's the basic foundation of mathematics.
The P means do things in parentheses first. Not things multiplied by things in parentheses.

P (parentheses) = (9+3)=12

E (exponents) = no exponents

M/D (multiplication and division, left to right) = 48/2=24 then 24(12)= 288

A/S (addition and subtraction, left to right) = no addition or subtraction

P = INSIDE the parentheses. :nono:

48÷2(9+3)=

48÷2(12)=

24(12)=

288

Proof:

Replace a number with a variable. I choose to replace 3 with x.

48÷2(9+x)=288

24(9+x)=288

216+24x=288

24x=72

x=3

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