Answer:

Step-by-step explanation:
Let the number of cups of onions Katrina still needs to chop = x
She has already chopped the onions =
cups ≈
cups
So total amount of chopped onions =
cups
Since, onion soup recipe calls for the chopped onions =
cups ≈
cups
Therefore, equation which shows the number of cups of onions to be chopped more will be,

We further solve this equation for the value of x,
x = 
x = 
=
cups
≈
cups