The Sum Of Two Numbers Is 18 And Their Difference Is 7
The problem given says that 2 unknown numbers are given, whose sum is equal to 18 and the difference is 7. Let's find the two numbers :When we add the two numbers :
X + Y = 18
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 = 18 X - Y = 7 2X = 25 |
Let's divide 25 to 2 for the first number "X" .
X/2 = 12.5
First number is 12.5
X + Y = 18
So ;
12.5 + Y = 18
Y = 18 - 12.5
Y = 5.5
Second number is 5.5
Question & Answer
The Sum Of Two Numbers Is 18 And Their Difference Is 7 : 12.5 And 5.5