3 is the greatest common denominator
Pretend you have a recipe for pasta. It says you need 2 cups of water. But your measuring cup measures ounces. You need to convert 2 cups into ounces.
Do you have A picture of the line?
The answer would be D because when you divide 10 by 4 you take one fourth out of ten
You can combine the same numbers with the same variables using the operation sign for each. For example, using your equation, you would combine the 3n and 4n which is 7n. So your equation would be
7n - 2
