Answer:
No, lisa will not be able to feed both the tanks same amount of food.
Explanation:
No, lisa will never be able to feed both tanks the same amount of food.
Let tank A contains x number of fish then according to the information given
Tank B contains 2/3x number of fish
Lisa feds 1 gm of food in tank A that means

Lisa feds 2 gm of food in tank B that means

we have to tell whether lisa will ever feed both tanks the same amount it will be possible if

which is not possible
Therefore, lisa will not be able to feed both the tanks same amount of food.