Question

Thursday evening, the temperature was 1 degree Celsius lower than it was that morning. What was the temperature at the base camp Thursday evening?

−9 degrees Celsius
−8 degrees Celsius
−7 degrees Celsius
−6 degrees Celsius

Answer 1

@Sadworld

Answer 2

Let x be the morning temperature and x-1 the evening temperature. Without any additional values, you won't be able to determine the evening temperature. You'll only get the expression x-1.