A boat can travel 29 mph. If it travels 217 miles with the current in the same lenght of the time it travels 189 against the current? What is the current
speed of current --- x mph
time to go 217 miles with the current = 217/(29+x)
time to go 189 againts current = 189/(29-x)
217(29+x) = 189/(29-x)
cross-multiply, solve for x