I assume you meant: Five more than twice the number is 17.
If so, you're going to set up your equation as: 17 = 2x+5
17 being the total, 2x being "twice the number", and +5 being "five more than".
Now, subtract 5 from both sides of the equation.
You have 12 = 2x
Then, divide by 2.
You get 6 = x.
