Question

one number is 13 more than another number. If the sum of the two numbers is 15, find the two numbers

Answer 1

x - the first numberx + 13 - the second number
The equation:
x + x + 13 = 152x + 13 = 15    |-132x = 2    |:2x = 1
x + 13 = 1 + 13 = 14
Answer: 1 and 14