Answer:
First blank is 15.
Second blank is 60.
Third blank is 8.

Explanation:
To clear the fractions, multiply both side by the least common multiple (or a common multiple) of the denominators you see.
The least common multiply of 4 and 5 is 4(5)=20.
So multiply both sides by 20:


Simplify:


First blank is 15.
Second blank is 60.
Third blank is 8.