The Sum Of Two Numbers Is 12 And Their Difference Is 7
The problem given says that 2 unknown numbers are given, whose sum is equal to 12 and the difference is 7. Let's find the two numbers :When we add the two numbers :
X + Y = 12
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 = 12 X - Y = 7 2X = 19 |
Let's divide 19 to 2 for the first number "X" .
X/2 = 9.5
First number is 9.5
X + Y = 12
So ;
9.5 + Y = 12
Y = 12 - 9.5
Y = 2.5
Second number is 2.5
Question & Answer
The Sum Of Two Numbers Is 12 And Their Difference Is 7 : 9.5 And 2.5