The difference of two numbers is 1. Their sum is 19. Find the numbers and show your work

9 and 10? because if you take 10-9 you get 1. Then you add 10+9 and you get 19. 

let the first number be x and the second be y x - y = 1 x + y = 19 adding the two equations 2x = 20 x = 10 substituting the value of x into the equation 10 - y = 1 y = 9 please mark as brainliest