The Sum Of Two Numbers Is 20 And Their Difference Is 19

The problem given says that 2 unknown numbers are given, whose sum is equal to 20 and the difference is 19. Let's find the two numbers :

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

The difference of two numbers :
X - Y = 19

Solution :

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

X + Y = 20
X - Y = 19

2X = 39

Let's divide 39 to 2 for the first number "X" .

X/2 = 19.5

First number is 19.5

X + Y = 20
So ;
19.5 + Y = 20
Y = 20 - 19.5
Y = 0.5

Second number is 0.5

Question & Answer
The Sum Of Two Numbers Is 20 And Their Difference Is 19 : 19.5 And 0.5

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