The Sum Of Two Numbers Is 10 And Their Difference Is 9
The problem given says that 2 unknown numbers are given, whose sum is equal to 10 and the difference is 9. Let's find the two numbers :When we add the two numbers :
X + Y = 10
The difference of two numbers :
X - Y = 9
Solution :
If we add the two equations eachother , then we can find the first number.
|
X + Y = 10 X - Y = 9 2X = 19 |
Let's divide 19 to 2 for the first number "X" .
X/2 = 9.5
First number is 9.5
X + Y = 10
So ;
9.5 + Y = 10
Y = 10 - 9.5
Y = 0.5
Second number is 0.5
Question & Answer
The Sum Of Two Numbers Is 10 And Their Difference Is 9 : 9.5 And 0.5