The Sum Of Two Numbers Is 70 And Their Difference Is 10
The problem given says that 2 unknown numbers are given, whose sum is equal to 70 and the difference is 10. Let's find the two numbers :When we add the two numbers :
X + Y = 70
The difference of two numbers :
X - Y = 10
Solution :
If we add the two equations eachother , then we can find the first number.
X + Y = 70 X - Y = 10 2X = 80 |
Let's divide 80 to 2 for the first number "X" .
X/2 = 40
First number is 40
X + Y = 70
So ;
40 + Y = 70
Y = 70 - 40
Y = 30
Second number is 30
Question & Answer
The Sum Of Two Numbers Is 70 And Their Difference Is 10 : 40 And 30