The Sum Of Two Numbers Is 69 And Their Difference Is 20
The problem given says that 2 unknown numbers are given, whose sum is equal to 69 and the difference is 20. Let's find the two numbers :When we add the two numbers :
X + Y = 69
The difference of two numbers :
X - Y = 20
Solution :
If we add the two equations eachother , then we can find the first number.
X + Y = 69 X - Y = 20 2X = 89 |
Let's divide 89 to 2 for the first number "X" .
X/2 = 44.5
First number is 44.5
X + Y = 69
So ;
44.5 + Y = 69
Y = 69 - 44.5
Y = 24.5
Second number is 24.5
Question & Answer
The Sum Of Two Numbers Is 69 And Their Difference Is 20 : 44.5 And 24.5