TI84 Plus guy here yet we still get the same correct answer!!!!The HP-41C is amazing. I think I was in my first year of college. I had been using a Ti-55. I took a summer course called something like "advanced math" which was just a fun course for math geeks who wanted to learn things mathematical outside of the regular curriculum.
The teacher had an HP-41CV. Once I got the hang of RPN I fell in love with that thing. She let me borrow it over a weekend. I was visiting my parents over that weekend and was showing this amazing calculator to my parents.
That Christmas, there was a box with my name on it which contained the usual underwear and that stuff. We laughed and my mother said, "keep looking". At the bottom was an HP-41CV. I freaked out because that was VERY unlike my mother. It's the best gift I have ever received and I still have it today (and it's working).
Being an HP geek, I have simulators for:
They're all free. I have the real hardware for the HP50g, HP Prime, HP41CV and HP-42S.
I guess it's a similar sickness to having all these guitars
Once you get the hang of RPN, there's no turning back. For the expression in question, I did this:
6÷2(1+2) = x Solve for x
6 ENT 2 ENT 1 ENT 2 + X /
Admittedly, I entered the expression how I am seeing it. Others could have done it differently and gotten x = 9.
I mean the calculators have nothing to do with it. One actually has to understand and do the real math to get it right after all *_*