1. The problem statement, all variables and given/known data Driving along a crowded freeway, you notice that it takes a time t to go from one mile marker to the next. When you increase your speed by 7.0 mi/h, the time to go one mile decreases by 12 s. What was your original speed? 2. Relevant equations D = VT 3. The attempt at a solution D = VT 1 = (Vi+7)(T-0.2) Vi = 1/(T-0.2) - 7 I have 2 unknowns and I don't know how to solve????