The Sum Of Two Numbers Is 55 And Their Difference Is 13

The problem given says that 2 unknown numbers are given, whose sum is equal to 55 and the difference is 13. Let's find the two numbers :

When we add the two numbers :
X + Y = 55

The difference of two numbers :
X - Y = 13

Solution :

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

X + Y = 55
X - Y = 13

2X = 68

Let's divide 68 to 2 for the first number "X" .

X/2 = 34

First number is 34

X + Y = 55
So ;
34 + Y = 55
Y = 55 - 34
Y = 21

Second number is 21

Question & Answer
The Sum Of Two Numbers Is 55 And Their Difference Is 13 : 34 And 21