Nikos sold 87 muffins
Solution:
Given that Nikos spent $28.50 on supplies
He sold muffins for $0.75 each, and made a profit of $36.75
To find: Number of muffins sold by Nikos
Thus Nikos must have sold for = $28.50 + $36.75 = $ 65.25
He sold each muffin for $ 0.75
Number of muffins sold by Nikos:


Thus Nikos sold 87 muffins