Temperature of Berlin increases by 2°C every hour from 7am. At 2pm the temperature was 10°C. Find the temperature at 7am
+658 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
