So,
#1:

Convert to like improper fractions.

Add.

So, one solution could be

.
Another solution could by 9. There is also 10, 11, 12, etc., and all numbers in between.
#2:

Convert into improper fraction form.

Multiply.

Cross-cancel, and we have our final result.

k < 96
96 is not a solution.
95 is a solution.
So is 94, 93, 92, etc, and all numbers in between.
Answer:
it might be 8-9.5 correct me if i am wrong
Step-by-step explanation:
-6x=19+17
-6x=36 /(-6)
x=-6
The answer is his tank can hold 15 gallons i think