If nine times a certain number is subtracted from 65, the result is 2. Find the number.
A) 14
B) 15
C) 7
D) 5

Question

Quizplus · Accepted Answer

Let's call the certain number x. The problem tells us that if we subtract nine times x from 65, we get 2. In equation form, that is: 
65 - 9x = 2 
To solve for x, we need to isolate x on one side of the equation. We can start by subtracting 65 from both sides: 
-9x = -63 
Now we can divide both sides by -9 to get: 
x = 7 
So the certain number is 7, and the correct answer choice is C.

If Nine Times a Certain Number Is Subtracted from 65