The Sum Of Two Numbers Is 51 And Their Difference Is 21
The problem given says that 2 unknown numbers are given, whose sum is equal to 51 and the difference is 21. Let's find the two numbers :When we add the two numbers :
X + Y = 51
The difference of two numbers :
X - Y = 21
Solution :
If we add the two equations eachother , then we can find the first number.
X + Y = 51 X - Y = 21 2X = 72 |
Let's divide 72 to 2 for the first number "X" .
X/2 = 36
First number is 36
X + Y = 51
So ;
36 + Y = 51
Y = 51 - 36
Y = 15
Second number is 15
Question & Answer
The Sum Of Two Numbers Is 51 And Their Difference Is 21 : 36 And 15