Answer:
<u><em>400-x/3</em></u>
Step-by-step explanation:
Savannah started with 400400400 chocolate chips, but she saved xxx chips for a garnish. So she used 400-x400−x400, minus, x chips in the brownies.
Hint #22 / 3
She split the 400-x400−x400, minus, x chips evenly among 333 pans of brownies. So each pan had \dfrac{400-x}{3}
3
400−x
start fraction, 400, minus, x, divided by, 3, end fraction chips.
Hint #33 / 3
There were \dfrac{400-x}{3}
3
400−x
start fraction, 400, minus, x, divided by, 3, end fraction chocolate chips in each pan of brownies.