The Sum Of Two Numbers Is 21 And Their Difference Is 11
The problem given says that 2 unknown numbers are given, whose sum is equal to 21 and the difference is 11. Let's find the two numbers :When we add the two numbers :
X + Y = 21
The difference of two numbers :
X - Y = 11
Solution :
If we add the two equations eachother , then we can find the first number.
X + Y = 21 X - Y = 11 2X = 32 |
Let's divide 32 to 2 for the first number "X" .
X/2 = 16
First number is 16
X + Y = 21
So ;
16 + Y = 21
Y = 21 - 16
Y = 5
Second number is 5
Question & Answer
The Sum Of Two Numbers Is 21 And Their Difference Is 11 : 16 And 5