The Sum Of Two Numbers Is 19 And Their Difference Is 1

The problem given says that 2 unknown numbers are given, whose sum is equal to 19 and the difference is 1. Let's find the two numbers :

When we add the two numbers :
X + Y = 19

The difference of two numbers :
X - Y = 1

Solution :

If we add the two equations eachother , then we can find the first number.

X + Y = 19
X - Y = 1

2X = 20

Let's divide 20 to 2 for the first number "X" .

X/2 = 10

First number is 10

X + Y = 19
So ;
10 + Y = 19
Y = 19 - 10
Y = 9

Second number is 9

Question & Answer
The Sum Of Two Numbers Is 19 And Their Difference Is 1 : 10 And 9