I believe you just have to draw 2 little lines in between AB and CD.
It has one solution that I know of
A) i think is the correct answer
For Part A: the answer is 90 muffins total.
For Part B: the answer is 150 muffins total.
All you have to do is divide x (number of muffins the baker made) by 0.4 to get the total amount of muffins made.