The Sum Of Two Numbers Is 31 And Their Difference Is 21
The problem given says that 2 unknown numbers are given, whose sum is equal to 31 and the difference is 21. Let's find the two numbers :When we add the two numbers :
X + Y = 31
The difference of two numbers :
X - Y = 21
Solution :
If we add the two equations eachother , then we can find the first number.
X + Y = 31 X - Y = 21 2X = 52 |
Let's divide 52 to 2 for the first number "X" .
X/2 = 26
First number is 26
X + Y = 31
So ;
26 + Y = 31
Y = 31 - 26
Y = 5
Second number is 5
Question & Answer
The Sum Of Two Numbers Is 31 And Their Difference Is 21 : 26 And 5