The Sum Of Two Numbers Is 81 And Their Difference Is 19
The problem given says that 2 unknown numbers are given, whose sum is equal to 81 and the difference is 19. Let's find the two numbers :When we add the two numbers :
X + Y = 81
The difference of two numbers :
X - Y = 19
Solution :
If we add the two equations eachother , then we can find the first number.
X + Y = 81 X - Y = 19 2X = 100 |
Let's divide 100 to 2 for the first number "X" .
X/2 = 50
First number is 50
X + Y = 81
So ;
50 + Y = 81
Y = 81 - 50
Y = 31
Second number is 31
Question & Answer
The Sum Of Two Numbers Is 81 And Their Difference Is 19 : 50 And 31