The Sum Of Two Numbers Is 77 And Their Difference Is 17
The problem given says that 2 unknown numbers are given, whose sum is equal to 77 and the difference is 17. Let's find the two numbers :When we add the two numbers :
X + Y = 77
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 = 77 X - Y = 17 2X = 94 |
Let's divide 94 to 2 for the first number "X" .
X/2 = 47
First number is 47
X + Y = 77
So ;
47 + Y = 77
Y = 77 - 47
Y = 30
Second number is 30
Question & Answer
The Sum Of Two Numbers Is 77 And Their Difference Is 17 : 47 And 30