instruction:
The task is to generate the correct answer for a given math problem.
question:
Problem: 30 pens and 75 pencils were purchased for 750 . if the average price of a pencil was 2.00 , find the average price of a pen .
answer:
20


question:
Problem: the total age of a and b is 14 years more than the total age of b and c . c is how many years younger than a ?
answer:
14


question:
Problem: during a car trip , maria stopped to rest after she traveled 1 / 2 of the total distance to her destination . she stopped again after she traveled 1 / 4 of the distance remaining between her first stop and her destination , and then she drove the remaining 105 miles to her detination . what was the total distance , in miles from maria ' s starting point to her destination ?
answer:

280