The Sum Of Two Numbers Is 18 And Their Difference Is 3
The problem given says that 2 unknown numbers are given, whose sum is equal to 18 and the difference is 3. Let's find the two numbers :When we add the two numbers :
X + Y = 18
The difference of two numbers :
X - Y = 3
Solution :
If we add the two equations eachother , then we can find the first number.
|
X + Y = 18 X - Y = 3 2X = 21 |
Let's divide 21 to 2 for the first number "X" .
X/2 = 10.5
First number is 10.5
X + Y = 18
So ;
10.5 + Y = 18
Y = 18 - 10.5
Y = 7.5
Second number is 7.5
Question & Answer
The Sum Of Two Numbers Is 18 And Their Difference Is 3 : 10.5 And 7.5