The Sum Of Two Numbers Is 18 And Their Difference Is 4

The problem given says that 2 unknown numbers are given, whose sum is equal to 18 and the difference is 4. Let's find the two numbers :

When we add the two numbers :
X + Y = 18

The difference of two numbers :
X - Y = 4

Solution :

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

X + Y = 18
X - Y = 4

2X = 22

Let's divide 22 to 2 for the first number "X" .

X/2 = 11

First number is 11

X + Y = 18
So ;
11 + Y = 18
Y = 18 - 11
Y = 7

Second number is 7

Question & Answer
The Sum Of Two Numbers Is 18 And Their Difference Is 4 : 11 And 7

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