The Sum Of Two Numbers Is 79 And Their Difference Is 7
The problem given says that 2 unknown numbers are given, whose sum is equal to 79 and the difference is 7. Let's find the two numbers :When we add the two numbers :
X + Y = 79
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 = 79 X - Y = 7 2X = 86 |
Let's divide 86 to 2 for the first number "X" .
X/2 = 43
First number is 43
X + Y = 79
So ;
43 + Y = 79
Y = 79 - 43
Y = 36
Second number is 36
Question & Answer
The Sum Of Two Numbers Is 79 And Their Difference Is 7 : 43 And 36