At the start of her shift at Midtown Bakery, Megan made some batches of cookies that called for 3 cups of flour each. Then, she used the remaining 8 cups of flour she had to make a pan of muffins. She started her shift with a 20-cup bag of flour.

Which equation can you use to find how many batches of cookies, x, Megan made?
How many batches of cookies did Megan make?

1. 8x+3=20
2. 8(x+3)=20
3. 3x+8=20
4.3(x+8)=20

Write your answer as a whole number or a simplified fraction.
_____ batches of cookies