The Sum Of Two Numbers Is 20 And Their Difference Is 6

The problem given says that 2 unknown numbers are given, whose sum is equal to 20 and the difference is 6. Let's find the two numbers :

When we add the two numbers :
X + Y = 20

The difference of two numbers :
X - Y = 6

Solution :

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

X + Y = 20
X - Y = 6

2X = 26

Let's divide 26 to 2 for the first number "X" .

X/2 = 13

First number is 13

X + Y = 20
So ;
13 + Y = 20
Y = 20 - 13
Y = 7

Second number is 7

Question & Answer
The Sum Of Two Numbers Is 20 And Their Difference Is 6 : 13 And 7