The Sum Of Two Numbers Is 20 And Their Difference Is 2
The problem given says that 2 unknown numbers are given, whose sum is equal to 20 and the difference is 2. Let's find the two numbers :When we add the two numbers :
X + Y = 20
The difference of two numbers :
X - Y = 2
Solution :
If we add the two equations eachother , then we can find the first number.
|
X + Y = 20 X - Y = 2 2X = 22 |
Let's divide 22 to 2 for the first number "X" .
X/2 = 11
First number is 11
X + Y = 20
So ;
11 + Y = 20
Y = 20 - 11
Y = 9
Second number is 9
Question & Answer
The Sum Of Two Numbers Is 20 And Their Difference Is 2 : 11 And 9