Question 281386
Given that the sum of two numbers is 45
Let the first number by x
So the second number should be (45 - x)

Also it is given that first number is 9 less then the second number
so it means if we add 9 to first number then it would be equal to second number

x + 9 = 45 -x

2x = 45 - 9

2x = 36

x = 18

So first number is 18 and 
second number is (45 - 18)= 27