The Sum Of Two Numbers Is 72 And Their Difference Is 20
The problem given says that 2 unknown numbers are given, whose sum is equal to 72 and the difference is 20. Let's find the two numbers :When we add the two numbers :
X + Y = 72
The difference of two numbers :
X - Y = 20
Solution :
If we add the two equations eachother , then we can find the first number.
X + Y = 72 X - Y = 20 2X = 92 |
Let's divide 92 to 2 for the first number "X" .
X/2 = 46
First number is 46
X + Y = 72
So ;
46 + Y = 72
Y = 72 - 46
Y = 26
Second number is 26
Question & Answer
The Sum Of Two Numbers Is 72 And Their Difference Is 20 : 46 And 26