The Sum Of Two Numbers Is 31 And Their Difference Is 11
The problem given says that 2 unknown numbers are given, whose sum is equal to 31 and the difference is 11. Let's find the two numbers :When we add the two numbers :
X + Y = 31
The difference of two numbers :
X - Y = 11
Solution :
If we add the two equations eachother , then we can find the first number.
X + Y = 31 X - Y = 11 2X = 42 |
Let's divide 42 to 2 for the first number "X" .
X/2 = 21
First number is 21
X + Y = 31
So ;
21 + Y = 31
Y = 31 - 21
Y = 10
Second number is 10
Question & Answer
The Sum Of Two Numbers Is 31 And Their Difference Is 11 : 21 And 10