I really need help on this, how do you get 20 as a denominator and 19 as a numerator in the end answer? Pls help

Find dy/dx using implicit differentiation ln(20+e^xy)=y

15 liters is approximately how many gallons

The relative growth rate for a certain type of fungi is 60% per hour.a small culture has formed and in just 6 hours the count shows to be 20,273 fungi in the culture.what is the initial number of fungi in the culture?