The Sum Of Two Numbers Is 10 And Their Difference Is 7
The problem given says that 2 unknown numbers are given, whose sum is equal to 10 and the difference is 7. Let's find the two numbers :When we add the two numbers :
X + Y = 10
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 = 10 X - Y = 7 2X = 17 |
Let's divide 17 to 2 for the first number "X" .
X/2 = 8.5
First number is 8.5
X + Y = 10
So ;
8.5 + Y = 10
Y = 10 - 8.5
Y = 1.5
Second number is 1.5
Question & Answer
The Sum Of Two Numbers Is 10 And Their Difference Is 7 : 8.5 And 1.5