when 8 is subtracted from twice a certain number,the result is 20.what is that number?

Answer 1

I would start by putting into numbers and variables, with the certain number being represented by a letter. That would get you this:

2x- 8 = 20

After this you would just balance the equation by adding 8 to both sides

2x = 28

Then divide by 2 to get x by itself. So therefore,

x = 14