The Sum Of Two Numbers Is 78 And Their Difference Is 28
The problem given says that 2 unknown numbers are given, whose sum is equal to 78 and the difference is 28. Let's find the two numbers :When we add the two numbers :
X + Y = 78
The difference of two numbers :
X - Y = 28
Solution :
If we add the two equations eachother , then we can find the first number.
X + Y = 78 X - Y = 28 2X = 106 |
Let's divide 106 to 2 for the first number "X" .
X/2 = 53
First number is 53
X + Y = 78
So ;
53 + Y = 78
Y = 78 - 53
Y = 25
Second number is 25
Question & Answer
The Sum Of Two Numbers Is 78 And Their Difference Is 28 : 53 And 25