The Sum Of Two Numbers Is 13 And Their Difference Is 7
The problem given says that 2 unknown numbers are given, whose sum is equal to 13 and the difference is 7. Let's find the two numbers :When we add the two numbers :
X + Y = 13
The difference of two numbers :
X - Y = 7
Solution :
If we add the two equations eachother , then we can find the first number.
X + Y = 13 X - Y = 7 2X = 20 |
Let's divide 20 to 2 for the first number "X" .
X/2 = 10
First number is 10
X + Y = 13
So ;
10 + Y = 13
Y = 13 - 10
Y = 3
Second number is 3
Question & Answer
The Sum Of Two Numbers Is 13 And Their Difference Is 7 : 10 And 3