Answer:
She can fill 19 pots.
Explanation:
Yao Xin puts
liters of potting soil in each pot.
Suppose, the number of pots Yao Xin can fill is

So, the total amount of potting soil in
number of pots will be:
liters.
Given that, she has
liters of potting soil. So, the equation will be........
So, she can fill pots.