The Sum Of Two Numbers Is 30 And Their Difference Is 13
The problem given says that 2 unknown numbers are given, whose sum is equal to 30 and the difference is 13. Let's find the two numbers :When we add the two numbers :
X + Y = 30
The difference of two numbers :
X - Y = 13
Solution :
If we add the two equations eachother , then we can find the first number.
X + Y = 30 X - Y = 13 2X = 43 |
Let's divide 43 to 2 for the first number "X" .
X/2 = 21.5
First number is 21.5
X + Y = 30
So ;
21.5 + Y = 30
Y = 30 - 21.5
Y = 8.5
Second number is 8.5
Question & Answer
The Sum Of Two Numbers Is 30 And Their Difference Is 13 : 21.5 And 8.5