The Sum Of Two Numbers Is 36 And Their Difference Is 18

The problem given says that 2 unknown numbers are given, whose sum is equal to 36 and the difference is 18. Let's find the two numbers :

When we add the two numbers :
X + Y = 36

The difference of two numbers :
X - Y = 18

Solution :

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

X + Y = 36
X - Y = 18

2X = 54

Let's divide 54 to 2 for the first number "X" .

X/2 = 27

First number is 27

X + Y = 36
So ;
27 + Y = 36
Y = 36 - 27
Y = 9

Second number is 9

Question & Answer
The Sum Of Two Numbers Is 36 And Their Difference Is 18 : 27 And 9