The Sum Of Two Numbers Is 31 And Their Difference Is 8
The problem given says that 2 unknown numbers are given, whose sum is equal to 31 and the difference is 8. Let's find the two numbers :When we add the two numbers :
X + Y = 31
The difference of two numbers :
X - Y = 8
Solution :
If we add the two equations eachother , then we can find the first number.
|
X + Y = 31 X - Y = 8 2X = 39 |
Let's divide 39 to 2 for the first number "X" .
X/2 = 19.5
First number is 19.5
X + Y = 31
So ;
19.5 + Y = 31
Y = 31 - 19.5
Y = 11.5
Second number is 11.5
Question & Answer
The Sum Of Two Numbers Is 31 And Their Difference Is 8 : 19.5 And 11.5