Six friends each use a $2-off coupon to buy themselves a movie ticket. They spend a total of$42. What is the price of one movie ticket without the coupon

Let's assume the price of one movie ticket without the coupon is x dollars.

With the $2-off coupon, the price of one movie ticket would be x - 2 dollars.
Since each of the six friends used the coupon, the total amount spent on movie tickets would be 6 * (x - 2) dollars.
According to the information given, this total amount is $42.
So we have the equation: 6 * (x - 2) = 42.
First, we simplify the equation: 6x - 12 = 42.
Add 12 to both sides of the equation: 6x = 54.
Divide both sides of the equation by 6: x = 9.
Therefore, the price of one movie ticket without the coupon is $9. Answer: \boxed{9}.