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[-] zarkanian@sh.itjust.works 0 points 6 months ago

They multiplied both sides by 10.

0.9999... times 10 is 9.9999...

X times 10 is 10x.

[-] SmartmanApps@programming.dev 0 points 6 months ago

X times 10 is 10x

10x is 9.9999999....

As I said, they didn't substitute on both sides, only one, thus breaking the rules around rearranging algebra. Anything you do to one side you have to do to the other.

this post was submitted on 27 Jun 2024
818 points (95.2% liked)

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