The Sum Of Two Numbers Is 87 And Their Difference Is 29

The problem given says that 2 unknown numbers are given, whose sum is equal to 87 and the difference is 29. Let's find the two numbers :

When we add the two numbers :
X + Y = 87

The difference of two numbers :
X - Y = 29

Solution :

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

X + Y = 87
X - Y = 29

2X = 116

Let's divide 116 to 2 for the first number "X" .

X/2 = 58

First number is 58

X + Y = 87
So ;
58 + Y = 87
Y = 87 - 58
Y = 29

Second number is 29

Question & Answer
The Sum Of Two Numbers Is 87 And Their Difference Is 29 : 58 And 29