The Sum Of Two Numbers Is 71 And Their Difference Is 9
The problem given says that 2 unknown numbers are given, whose sum is equal to 71 and the difference is 9. Let's find the two numbers :When we add the two numbers :
X + Y = 71
The difference of two numbers :
X - Y = 9
Solution :
If we add the two equations eachother , then we can find the first number.
X + Y = 71 X - Y = 9 2X = 80 |
Let's divide 80 to 2 for the first number "X" .
X/2 = 40
First number is 40
X + Y = 71
So ;
40 + Y = 71
Y = 71 - 40
Y = 31
Second number is 31
Question & Answer
The Sum Of Two Numbers Is 71 And Their Difference Is 9 : 40 And 31