The Sum Of Two Numbers Is 90 And Their Difference Is 10
The problem given says that 2 unknown numbers are given, whose sum is equal to 90 and the difference is 10. Let's find the two numbers :When we add the two numbers :
X + Y = 90
The difference of two numbers :
X - Y = 10
Solution :
If we add the two equations eachother , then we can find the first number.
X + Y = 90 X - Y = 10 2X = 100 |
Let's divide 100 to 2 for the first number "X" .
X/2 = 50
First number is 50
X + Y = 90
So ;
50 + Y = 90
Y = 90 - 50
Y = 40
Second number is 40
Question & Answer
The Sum Of Two Numbers Is 90 And Their Difference Is 10 : 50 And 40