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In the context of algebra they are interchangeable, when shit gets more complex people use the other one.
When / appears, computers think in fractions, which will give virtually the same answer as ÷ for basic stuff.
That's where the difference comes from, not from a dumb equation which is so...
They are different.
The ÷ is usually reserved for algebra only.
The / is commonly used for everything division/fraction related.
Oh wait...There's a meme for that.
https://xkcd.com/2687/
I don't know how you can fail that hard, but congratulations.
Edit: Unless you used "÷" instead of "/ "for division. Then everything is correct, including the answer 9.
I actually didn't.
If you switch from "natural language" to "math input" the formula gets changed automatically.
I am not sneaky, you people suck at using the program.
Go and try yourself. Type that sht in natural language then switch to math input and hit Enter.
The answer is 9 for the way the question is displayed (cuz PEDMAS)
People get 1 because 6/2(2+1) is taught to be solved as 6/(2(2+1)) due to juxtaposition. It's implied that you are gonna do the multiplication then do the division.
It all comes down to writing shit better. Better to use multiple...
Spices kill bacteria and the actual cooking kills some of the remaining ones.
Some people wash the rice before soaking it (even though the rice isn't always dirty).
Uncooked rice always leads to food poisoning and it's hell for digestion.