instruction:
The task is to generate the correct answer for a given math problem.
question:
Problem: john invests $ x at the semi - annual constant compounded rate of 2 percent and also does $ 20,000 at the quarterly constant compounded rate of 4 percent . if the interests are the same after 1 year , what is the value of x ? ?
answer:
40,402


question:
Problem: the average age of 10 men is increased by years when two of them whose ages are 21 years and 23 years are replaced by two new men . the average age of the two new men is
answer:
3


question:
Problem: the overall age of x and y is 19 year greater than the overall age of y and z . z is how many decades younger that x ?
answer:

19