The Sum Of Two Numbers Is 78 And Their Difference Is 17
The problem given says that 2 unknown numbers are given, whose sum is equal to 78 and the difference is 17. Let's find the two numbers :When we add the two numbers :
X + Y = 78
The difference of two numbers :
X - Y = 17
Solution :
If we add the two equations eachother , then we can find the first number.
X + Y = 78 X - Y = 17 2X = 95 |
Let's divide 95 to 2 for the first number "X" .
X/2 = 47.5
First number is 47.5
X + Y = 78
So ;
47.5 + Y = 78
Y = 78 - 47.5
Y = 30.5
Second number is 30.5
Question & Answer
The Sum Of Two Numbers Is 78 And Their Difference Is 17 : 47.5 And 30.5