Mathematics, 23.05.2021 18:30, bigboyethanlanp2s9lm

At 3pm the temprature was 9ºc by 11pm, it has dropped 21ºc. what was the temprature at 11pm? What is the answer?

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At 3pm the temprature was 9ºc by 11pm, it has dropped 21ºc. what was the temprature at 11pm? What is...