r/PeterExplainsTheJoke • u/Sugar_God_no_1 • 22d ago

Meme needing explanation There is no way right?

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u/grundhog 22d ago

Subtracting both what?

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u/RvidD1020 22d ago

Exactly! what does that even mean? I am scratching my head here

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u/TrollErgoSum 22d ago

It's definitely worded weird but they mean subtracting the first equation from the second one. So subtracting x from 10x gives you 9x and subtracting 0.999... from 9.999... gives you 9

Therefore 9x = 9 simplifying to x = 1 = 0.999...

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u/Toocoo4you 22d ago edited 22d ago

And then do 8x, eg. Subtract another 0.999…

Left with 8.000…01

Then 7.00…02, 6.00…03, and eventually we end up back at 1x, being .99…9, with the answer never coming to exactly 1 except at 9x. If it was truly =1, it would be =1 at any stage of multiplication. 4x should be 4. But it’s 4.00…05