The Sum Of Two Numbers Is 86 And Their Difference Is 23

The problem given says that 2 unknown numbers are given, whose sum is equal to 86 and the difference is 23. Let's find the two numbers :

When we add the two numbers :
X + Y = 86

The difference of two numbers :
X - Y = 23

Solution :

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

X + Y = 86
X - Y = 23

2X = 109

Let's divide 109 to 2 for the first number "X" .

X/2 = 54.5

First number is 54.5

X + Y = 86
So ;
54.5 + Y = 86
Y = 86 - 54.5
Y = 31.5

Second number is 31.5

Question & Answer
The Sum Of Two Numbers Is 86 And Their Difference Is 23 : 54.5 And 31.5