The Sum Of Two Numbers Is 23 And Their Difference Is 7
The problem given says that 2 unknown numbers are given, whose sum is equal to 23 and the difference is 7. Let's find the two numbers :When we add the two numbers :
X + Y = 23
The difference of two numbers :
X - Y = 7
Solution :
If we add the two equations eachother , then we can find the first number.
|
X + Y = 23 X - Y = 7 2X = 30 |
Let's divide 30 to 2 for the first number "X" .
X/2 = 15
First number is 15
X + Y = 23
So ;
15 + Y = 23
Y = 23 - 15
Y = 8
Second number is 8
Question & Answer
The Sum Of Two Numbers Is 23 And Their Difference Is 7 : 15 And 8