21. When Professor Soto began his trip to a mathematics conference, he noticed that the 2 digits of the recorded temperature, in degrees Fahrenheit, had a sum of 8. Later, he noticed that the 2 digits were reversed and that the temperature had warmed 18°F. What was the temperature, in degrees Fahrenheit, at the beginning of his trip?

Answer and Explanation

Your Answer is

Correct Answer is C

Explanation

Bring in the options, 35 is reversed 53-35=18 is in line with the meaning of the question, so choose C