The Sum Of Two Numbers Is 77 And Their Difference Is 15
The problem given says that 2 unknown numbers are given, whose sum is equal to 77 and the difference is 15. Let's find the two numbers :When we add the two numbers :
X + Y = 77
The difference of two numbers :
X - Y = 15
Solution :
If we add the two equations eachother , then we can find the first number.
|
X + Y = 77 X - Y = 15 2X = 92 |
Let's divide 92 to 2 for the first number "X" .
X/2 = 46
First number is 46
X + Y = 77
So ;
46 + Y = 77
Y = 77 - 46
Y = 31
Second number is 31
Question & Answer
The Sum Of Two Numbers Is 77 And Their Difference Is 15 : 46 And 31