Science Memes

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I just cited myself. (mander.xyz)

submitted 6 months ago by [email protected] to c/[email protected]

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[+] [email protected] -14 points 6 months ago (4 children)

X=.5555...

10x=5.5555...

Subtract x from both sides.

9x=5

X=1 .5555 must equal 1.

There it isn't. Because that math is bullshit.

[–] [email protected] 14 points 6 months ago

x = 5/9 is not 9/9. 5/9 = .55555...

You're proving that 0.555... equals 5/9 (which it does), not that it equals 1 (which it doesn't).

It's absolutely not the same result as x = 0.999... as you claim.

[–] [email protected] 10 points 6 months ago* (last edited 6 months ago)

?
Where did you get 9x=5 -> x=1
and 5/9 is 0.555... so it checks out.

[–] [email protected] 7 points 6 months ago

Quick maffs

[–] [email protected] 3 points 6 months ago* (last edited 6 months ago)

Lol what? How did you conclude that if 9x = 5 then x = 1? Surely you didn't pass algebra in high school, otherwise you could see that getting x from 9x = 5 requires dividing both sides by 9, which yields x = 5/9, i.e. 0.555... = 5/9 since x = 0.555....

Also, you shouldn't just use uppercase X in place of lowercase x or vice versa. Case is usually significant for variable names.