The Sum Of Two Numbers Is 87 And Their Difference Is 9
The problem given says that 2 unknown numbers are given, whose sum is equal to 87 and the difference is 9. Let's find the two numbers :When we add the two numbers :
X + Y = 87
The difference of two numbers :
X - Y = 9
Solution :
If we add the two equations eachother , then we can find the first number.
X + Y = 87 X - Y = 9 2X = 96 |
Let's divide 96 to 2 for the first number "X" .
X/2 = 48
First number is 48
X + Y = 87
So ;
48 + Y = 87
Y = 87 - 48
Y = 39
Second number is 39
Question & Answer
The Sum Of Two Numbers Is 87 And Their Difference Is 9 : 48 And 39