The Sum Of Two Numbers Is 15 And Their Difference Is 5
The problem given says that 2 unknown numbers are given, whose sum is equal to 15 and the difference is 5. Let's find the two numbers :When we add the two numbers :
X + Y = 15
The difference of two numbers :
X - Y = 5
Solution :
If we add the two equations eachother , then we can find the first number.
X + Y = 15 X - Y = 5 2X = 20 |
Let's divide 20 to 2 for the first number "X" .
X/2 = 10
First number is 10
X + Y = 15
So ;
10 + Y = 15
Y = 15 - 10
Y = 5
Second number is 5
Question & Answer
The Sum Of Two Numbers Is 15 And Their Difference Is 5 : 10 And 5