The Sum Of Two Numbers Is 57 And Their Difference Is 17

The problem given says that 2 unknown numbers are given, whose sum is equal to 57 and the difference is 17. Let's find the two numbers :

When we add the two numbers :
X + Y = 57

The difference of two numbers :
X - Y = 17

Solution :

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

X + Y = 57
X - Y = 17

2X = 74

Let's divide 74 to 2 for the first number "X" .

X/2 = 37

First number is 37

X + Y = 57
So ;
37 + Y = 57
Y = 57 - 37
Y = 20

Second number is 20

Question & Answer
The Sum Of Two Numbers Is 57 And Their Difference Is 17 : 37 And 20