The Sum Of Two Numbers Is 78 And Their Difference Is 12
The problem given says that 2 unknown numbers are given, whose sum is equal to 78 and the difference is 12. Let's find the two numbers :When we add the two numbers :
X + Y = 78
The difference of two numbers :
X - Y = 12
Solution :
If we add the two equations eachother , then we can find the first number.
|
X + Y = 78 X - Y = 12 2X = 90 |
Let's divide 90 to 2 for the first number "X" .
X/2 = 45
First number is 45
X + Y = 78
So ;
45 + Y = 78
Y = 78 - 45
Y = 33
Second number is 33
Question & Answer
The Sum Of Two Numbers Is 78 And Their Difference Is 12 : 45 And 33