The Sum Of Two Numbers Is 84 And Their Difference Is 39
The problem given says that 2 unknown numbers are given, whose sum is equal to 84 and the difference is 39. Let's find the two numbers :When we add the two numbers :
X + Y = 84
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 = 84 X - Y = 39 2X = 123 |
Let's divide 123 to 2 for the first number "X" .
X/2 = 61.5
First number is 61.5
X + Y = 84
So ;
61.5 + Y = 84
Y = 84 - 61.5
Y = 22.5
Second number is 22.5
Question & Answer
The Sum Of Two Numbers Is 84 And Their Difference Is 39 : 61.5 And 22.5