The Sum Of Two Numbers Is 64 And Their Difference Is 20

The problem given says that 2 unknown numbers are given, whose sum is equal to 64 and the difference is 20. Let's find the two numbers :

When we add the two numbers :
X + Y = 64

The difference of two numbers :
X - Y = 20

Solution :

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

X + Y = 64
X - Y = 20

2X = 84

Let's divide 84 to 2 for the first number "X" .

X/2 = 42

First number is 42

X + Y = 64
So ;
42 + Y = 64
Y = 64 - 42
Y = 22

Second number is 22

Question & Answer
The Sum Of Two Numbers Is 64 And Their Difference Is 20 : 42 And 22