The Sum Of Two Numbers Is 90 And Their Difference Is 23
The problem given says that 2 unknown numbers are given, whose sum is equal to 90 and the difference is 23. Let's find the two numbers :When we add the two numbers :
X + Y = 90
The difference of two numbers :
X - Y = 23
Solution :
If we add the two equations eachother , then we can find the first number.
|
X + Y = 90 X - Y = 23 2X = 113 |
Let's divide 113 to 2 for the first number "X" .
X/2 = 56.5
First number is 56.5
X + Y = 90
So ;
56.5 + Y = 90
Y = 90 - 56.5
Y = 33.5
Second number is 33.5
Question & Answer
The Sum Of Two Numbers Is 90 And Their Difference Is 23 : 56.5 And 33.5