The Sum Of Two Numbers Is 61 And Their Difference Is 20
The problem given says that 2 unknown numbers are given, whose sum is equal to 61 and the difference is 20. Let's find the two numbers :When we add the two numbers :
X + Y = 61
The difference of two numbers :
X - Y = 20
Solution :
If we add the two equations eachother , then we can find the first number.
|
X + Y = 61 X - Y = 20 2X = 81 |
Let's divide 81 to 2 for the first number "X" .
X/2 = 40.5
First number is 40.5
X + Y = 61
So ;
40.5 + Y = 61
Y = 61 - 40.5
Y = 20.5
Second number is 20.5
Question & Answer
The Sum Of Two Numbers Is 61 And Their Difference Is 20 : 40.5 And 20.5