The Sum Of Two Numbers Is 60 And Their Difference Is 21
The problem given says that 2 unknown numbers are given, whose sum is equal to 60 and the difference is 21. Let's find the two numbers :When we add the two numbers :
X + Y = 60
The difference of two numbers :
X - Y = 21
Solution :
If we add the two equations eachother , then we can find the first number.
|
X + Y = 60 X - Y = 21 2X = 81 |
Let's divide 81 to 2 for the first number "X" .
X/2 = 40.5
First number is 40.5
X + Y = 60
So ;
40.5 + Y = 60
Y = 60 - 40.5
Y = 19.5
Second number is 19.5
Question & Answer
The Sum Of Two Numbers Is 60 And Their Difference Is 21 : 40.5 And 19.5