Today, the population of Canyon Falls is $22{,}500$ and the population of Swift Creek is $15{,}200$. The population of Canyon Falls is decreasing at the rate of $740$ people each year while the population of Swift Creek is increasing at the rate of $1{,}500$ people each year. Assuming these rates continue into the future, in how many years from today will the population of Swift Creek equal twice the population of Canyon Falls? [[☃ radio 1]]