The Sum Of Two Numbers Is 39 And Their Difference Is 15
The problem given says that 2 unknown numbers are given, whose sum is equal to 39 and the difference is 15. Let's find the two numbers :When we add the two numbers :
X + Y = 39
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 = 39 X - Y = 15 2X = 54 |
Let's divide 54 to 2 for the first number "X" .
X/2 = 27
First number is 27
X + Y = 39
So ;
27 + Y = 39
Y = 39 - 27
Y = 12
Second number is 12
Question & Answer
The Sum Of Two Numbers Is 39 And Their Difference Is 15 : 27 And 12