The Sum Of Two Numbers Is 77 And Their Difference Is 12
The problem given says that 2 unknown numbers are given, whose sum is equal to 77 and the difference is 12. Let's find the two numbers :When we add the two numbers :
X + Y = 77
The difference of two numbers :
X - Y = 12
Solution :
If we add the two equations eachother , then we can find the first number.
|
X + Y = 77 X - Y = 12 2X = 89 |
Let's divide 89 to 2 for the first number "X" .
X/2 = 44.5
First number is 44.5
X + Y = 77
So ;
44.5 + Y = 77
Y = 77 - 44.5
Y = 32.5
Second number is 32.5
Question & Answer
The Sum Of Two Numbers Is 77 And Their Difference Is 12 : 44.5 And 32.5