I’m not sure if this is what your looking for but x = -49
Answer:
<h2>C. 1,004.8 cubic units</h2>
Step-by-step explanation:

Just one
11x+25=7x+15
11x - 7x = 15 -25
4x = -10
x = -10/4
x = -5/2
The algebraic equation is:
7x+10=35
You can also write it as:
10+7x=35
(It doesn't matter which one you choose)