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leximarie528
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

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