The Sum Of Two Numbers Is 80 And Their Difference Is 10
The problem given says that 2 unknown numbers are given, whose sum is equal to 80 and the difference is 10. Let's find the two numbers :When we add the two numbers :
X + Y = 80
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 = 80 X - Y = 10 2X = 90 |
Let's divide 90 to 2 for the first number "X" .
X/2 = 45
First number is 45
X + Y = 80
So ;
45 + Y = 80
Y = 80 - 45
Y = 35
Second number is 35
Question & Answer
The Sum Of Two Numbers Is 80 And Their Difference Is 10 : 45 And 35