The Sum Of Two Numbers Is 40 And Their Difference Is 7
The problem given says that 2 unknown numbers are given, whose sum is equal to 40 and the difference is 7. Let's find the two numbers :When we add the two numbers :
X + Y = 40
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 = 40 X - Y = 7 2X = 47 |
Let's divide 47 to 2 for the first number "X" .
X/2 = 23.5
First number is 23.5
X + Y = 40
So ;
23.5 + Y = 40
Y = 40 - 23.5
Y = 16.5
Second number is 16.5
Question & Answer
The Sum Of Two Numbers Is 40 And Their Difference Is 7 : 23.5 And 16.5