Answer:
12
Explanation:
It looks like you're given the equations ...
6px^3 = 3x^6p
Dividing both sides by 3px^3, we get ...
2 = x^3
Substituting that into the left side of the equation, we have ...
6px^3 = 12p
It appears this is the expression you want on the right.
6px^3 = 3x^6p = 12p