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Temperature of Berlin increases by 2°C every hour from 7am.  At 2pm the temperature was 10°C.  Find the temperature at 7am

 Mar 30, 2020
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How many hours passed?

 

For visulation:

7 - 8 am, 8 - 9 am, 9 - 10 am, 10 - 11 am, 11 - 12 am, 12 - 1 pm, 1 - 2 pm.

 

7 hours

 

1. x + 7 * 2 = 10

 

2. x + 14 = 10

 

3. x = -4

 

-4 Celcius

 Mar 30, 2020

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