The Sum Of Two Numbers Is 42 And Their Difference Is 20
The problem given says that 2 unknown numbers are given, whose sum is equal to 42 and the difference is 20. Let's find the two numbers :When we add the two numbers :
X + Y = 42
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 = 42 X - Y = 20 2X = 62 |
Let's divide 62 to 2 for the first number "X" .
X/2 = 31
First number is 31
X + Y = 42
So ;
31 + Y = 42
Y = 42 - 31
Y = 11
Second number is 11
Question & Answer
The Sum Of Two Numbers Is 42 And Their Difference Is 20 : 31 And 11