The Sum Of Two Numbers Is 15 And Their Difference Is 8
The problem given says that 2 unknown numbers are given, whose sum is equal to 15 and the difference is 8. Let's find the two numbers :When we add the two numbers :
X + Y = 15
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 = 15 X - Y = 8 2X = 23 |
Let's divide 23 to 2 for the first number "X" .
X/2 = 11.5
First number is 11.5
X + Y = 15
So ;
11.5 + Y = 15
Y = 15 - 11.5
Y = 3.5
Second number is 3.5
Question & Answer
The Sum Of Two Numbers Is 15 And Their Difference Is 8 : 11.5 And 3.5