Question

During a science experiment, Peter found the temperature of a certain liquid to be  − a∘

 Centigrade after he had raised the temperature by  x  degrees. Write an expression to represent the temperature of the liquid at the start of the experiment, before it was raised.

Answer 1

24

Explanation:

Answer 2

The original temperature was 'x' degrees below '-a'. That's (-a - x), or -(a+x).