The Sum Of Two Numbers Is 87 And Their Difference Is 30
The problem given says that 2 unknown numbers are given, whose sum is equal to 87 and the difference is 30. Let's find the two numbers :When we add the two numbers :
X + Y = 87
The difference of two numbers :
X - Y = 30
Solution :
If we add the two equations eachother , then we can find the first number.
|
X + Y = 87 X - Y = 30 2X = 117 |
Let's divide 117 to 2 for the first number "X" .
X/2 = 58.5
First number is 58.5
X + Y = 87
So ;
58.5 + Y = 87
Y = 87 - 58.5
Y = 28.5
Second number is 28.5
Question & Answer
The Sum Of Two Numbers Is 87 And Their Difference Is 30 : 58.5 And 28.5