The Sum Of Two Numbers Is 85 And Their Difference Is 31

The problem given says that 2 unknown numbers are given, whose sum is equal to 85 and the difference is 31. Let's find the two numbers :

When we add the two numbers :
X + Y = 85

The difference of two numbers :
X - Y = 31

Solution :

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

X + Y = 85
X - Y = 31

2X = 116

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

X/2 = 58

First number is 58

X + Y = 85
So ;
58 + Y = 85
Y = 85 - 58
Y = 27

Second number is 27

Question & Answer
The Sum Of Two Numbers Is 85 And Their Difference Is 31 : 58 And 27

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