Savings Calculation for Bicycle

Jake is trying to find out how much money he has saved for a new bicycle. He saves a fixed amount of money each week. If he currently has $80 saved and plans to save an additional $15 each week, he can express the total savings in terms of the number of weeks x using the following equation:

$$y = 15x + 80$$

where y is the total savings in dollars. Jake wants to know how many weeks it will take for his savings to reach $170. Calculate the value of x and report your answer as a decimal.