The Sum Of Two Numbers Is 81 And Their Difference Is 2
The problem given says that 2 unknown numbers are given, whose sum is equal to 81 and the difference is 2. Let's find the two numbers :When we add the two numbers :
X + Y = 81
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 = 81 X - Y = 2 2X = 83 |
Let's divide 83 to 2 for the first number "X" .
X/2 = 41.5
First number is 41.5
X + Y = 81
So ;
41.5 + Y = 81
Y = 81 - 41.5
Y = 39.5
Second number is 39.5
Question & Answer
The Sum Of Two Numbers Is 81 And Their Difference Is 2 : 41.5 And 39.5