The Sum Of Two Numbers Is 80 And Their Difference Is 39
The problem given says that 2 unknown numbers are given, whose sum is equal to 80 and the difference is 39. Let's find the two numbers :When we add the two numbers :
X + Y = 80
The difference of two numbers :
X - Y = 39
Solution :
If we add the two equations eachother , then we can find the first number.
|
X + Y = 80 X - Y = 39 2X = 119 |
Let's divide 119 to 2 for the first number "X" .
X/2 = 59.5
First number is 59.5
X + Y = 80
So ;
59.5 + Y = 80
Y = 80 - 59.5
Y = 20.5
Second number is 20.5
Question & Answer
The Sum Of Two Numbers Is 80 And Their Difference Is 39 : 59.5 And 20.5