The Sum Of Two Numbers Is 42 And Their Difference Is 18
The problem given says that 2 unknown numbers are given, whose sum is equal to 42 and the difference is 18. Let's find the two numbers :When we add the two numbers :
X + Y = 42
The difference of two numbers :
X - Y = 18
Solution :
If we add the two equations eachother , then we can find the first number.
X + Y = 42 X - Y = 18 2X = 60 |
Let's divide 60 to 2 for the first number "X" .
X/2 = 30
First number is 30
X + Y = 42
So ;
30 + Y = 42
Y = 42 - 30
Y = 12
Second number is 12
Question & Answer
The Sum Of Two Numbers Is 42 And Their Difference Is 18 : 30 And 12