The Sum Of Two Numbers Is 78 And Their Difference Is 23
The problem given says that 2 unknown numbers are given, whose sum is equal to 78 and the difference is 23. Let's find the two numbers :When we add the two numbers :
X + Y = 78
The difference of two numbers :
X - Y = 23
Solution :
If we add the two equations eachother , then we can find the first number.
|
X + Y = 78 X - Y = 23 2X = 101 |
Let's divide 101 to 2 for the first number "X" .
X/2 = 50.5
First number is 50.5
X + Y = 78
So ;
50.5 + Y = 78
Y = 78 - 50.5
Y = 27.5
Second number is 27.5
Question & Answer
The Sum Of Two Numbers Is 78 And Their Difference Is 23 : 50.5 And 27.5