What is the factor coefficient variable of 5c-15

To find the factor coefficient variable, you would divide the numbers by a number that could be divisible for both numbers. In the case, the number you going to be dividing with is 5.

When you divide, your equation would look like this:

When you divide the numbers by 5, you would end of up with 5(c-3).

Your answer would be 5(c-3).