Answer:
12 - 12
Explanation:
Given
Initial Temperature (at 12 midnight) = 12 deg C
By 6am; Temperature has decreased by 12 deg C
Required
What expression represents the situation
Provided that there was a decrement in the temperature; the system will b represented by Initial Temperature minus Change in temperature
Expression = Initial Temperature - Change in Temperature
Expression = 12C - 12C
Solving further to get the actual temperature at 6
Final Temperature = 12C - 12C
Final Temperature = 0 C