The Sum Of Two Numbers Is 70 And Their Difference Is 28
The problem given says that 2 unknown numbers are given, whose sum is equal to 70 and the difference is 28. Let's find the two numbers :When we add the two numbers :
X + Y = 70
The difference of two numbers :
X - Y = 28
Solution :
If we add the two equations eachother , then we can find the first number.
|
X + Y = 70 X - Y = 28 2X = 98 |
Let's divide 98 to 2 for the first number "X" .
X/2 = 49
First number is 49
X + Y = 70
So ;
49 + Y = 70
Y = 70 - 49
Y = 21
Second number is 21
Question & Answer
The Sum Of Two Numbers Is 70 And Their Difference Is 28 : 49 And 21