Find the time at the city falls on certain temperature — task. Mathematics State Board, Class 7.

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The temperature of the city at 1 pm was

12 °

above zero. If it decreases at the rate of

2 °

per hour, then after how many hours it would be

-4 °

After hours the temperature of the city will fall to

-4 °

(Note: Insert the time as \(24\) hours (1-24) pattern.)

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12. Find the time at the city falls on certain temperature