Question 295914
(25-2x)(10-2x)(x)-175<=0 
The inequality states that the left side is less and or equal to zero.

The inequality becomes 4x^3-70x^2+250x-175<=0
The actual exact roots are quite complicated.
Here are the approx 3.64439<=x<=12.9269 and x<=0.928661
From the above we can see that there are several integer solutions 4 through 12 that  work