Can someone explain the answer on the question here?

Although changes result from business transactions, the equality of the fundamental bookkeeping equation must remain. t/f

Ou have a 20-ounce bottle of juice. you pour out 14 of the bottle to share with a friend. if you pour out 3 ounces for yourself, what fraction of the 20 ounces will be left in the bottle? clear check 35 25 12 1320

How can you tell when x and y are not directly proportional?