thanks for your help I really think that it's three
Answer:
Step-by-step explanation:

Let's get all of the terms with the
on the right-hand side of the equation, and everything else on the left-hand side of the equation.
To do this, we should add
to both sides of the equation to remove the
from the left-hand side of the equation:


Finally, to get the
by itself, we can divide both sides by
:


The answer is C: the missing number is 25