what is the sum of 17 with the diffence of 1

Question

What two numbers have the sum of 17 and when you subtract those two numbers you get one

Answer 1

n + m = 17

n - m = 1

Add these two equations and get

2n = 18 ⇒ n = 9

From the second equation get

m = n - 1 = 9 - 1 = 8

Test the answers.