The Sum Of Two Numbers Is 78 And Their Difference Is 3
The problem given says that 2 unknown numbers are given, whose sum is equal to 78 and the difference is 3. Let's find the two numbers :When we add the two numbers :
X + Y = 78
The difference of two numbers :
X - Y = 3
Solution :
If we add the two equations eachother , then we can find the first number.
|
X + Y = 78 X - Y = 3 2X = 81 |
Let's divide 81 to 2 for the first number "X" .
X/2 = 40.5
First number is 40.5
X + Y = 78
So ;
40.5 + Y = 78
Y = 78 - 40.5
Y = 37.5
Second number is 37.5
Question & Answer
The Sum Of Two Numbers Is 78 And Their Difference Is 3 : 40.5 And 37.5