The Sum of Two Numbers is 68 and Their Difference is 5

The sum of two numbers is 68 and their difference is 5. What are the two numbers? Let's start by calling the two numbers we are looking for x and y.

The sum of x and y is 68. In other words, x plus y equals 68 and can be written as equation A:

x + y = 68

The difference between x and y is 5. In other words, x minus y equals 5 and can be written as equation B:

x - y = 5

Now solve equation B for x to get the revised equation B:

x - y = 5
x = 5 + y

Then substitute x in equation A from the revised equation B and then solve for y:

x + y = 68
5 + y + y = 68
5 + 2y = 68
2y = 63
y = 31.5

Now we know y is 31.5. Which means that we can substitute y for 31.5 in equation A and solve for x:

x + y = 68
x + 31.5 = 68
X = 36.5

Summary: The sum of two numbers is 68 and their difference is 5. What are the two numbers? Answer: 36.5 and 31.5 as proven here:

Sum: 36.5 + 31.5 = 68
Difference: 36.5 - 31.5 = 5

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