The Sum Of Two Numbers Is 71 And Their Difference Is 7
The problem given says that 2 unknown numbers are given, whose sum is equal to 71 and the difference is 7. Let's find the two numbers :When we add the two numbers :
X + Y = 71
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 = 71 X - Y = 7 2X = 78 |
Let's divide 78 to 2 for the first number "X" .
X/2 = 39
First number is 39
X + Y = 71
So ;
39 + Y = 71
Y = 71 - 39
Y = 32
Second number is 32
Question & Answer
The Sum Of Two Numbers Is 71 And Their Difference Is 7 : 39 And 32