Answer:
Original batch had 90 muffins
Step-by-step explanation:
m= muffins in original batch
So, each tray has m/6 muffins and 5 croissants, which totals m/6+5. The value must be at least 20, so we have this inequality:
m/6+5 is greater than or equal to 20. We multiple each side by 6 and get:
m is greater than or equal to 90 muffins.