Marissa bought 6 fewer pints of soda than of orange juice. how many cups of soda did she buy

We can write the number of orange juice as O. Then, Marissa bought O - 6 pints of soda.

Since one pint is two cups, then we can rewrite everything for cups:

2 (O - 6) = 2O - 12 cups of soda have been bought, where O is the amount of orange juice that Marissa had bought.