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places that have recorded both -40C and +40C
(lemmy.nz)
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this post was submitted on 12 Sep 2026
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Mildly Interesting
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9/5(conversion ratio) of -40 is -72 which is 32(offset) below -40.
So... (9/5[F/C])*(-40[C])+32=-40[F] is where they meet.
I prefer the converted fractions for ease. Your solution while right will confuse most Americans. (1.8x-40c)+32=-40f
Dear fellow Americans: Fun tip, lazy (but inaccurate) math is (2x-40c)+30= -50f which when you get to normal ranges works well enough in a margin of error. Or just learn to enjoy the beautiful thing that is Celsius and stop using/converting to Fahrenheit.