/ x 
  |     K(x,t)*theta(t)dt = f(x)
 / a
where the following are true:
a = -4
-4 < x < 0
K(x,t) = x + t
and 
f(x) = 1
Two questions:
1) does this equation fit the definition of a
"Volterra integral equation of the first kind"?
2) what is theta(t)? (or can it be proven that given the above
conditions
theta(t) does not exist?)
At the very least, f(a) = 0 is a necessary condition for consistency.
This equation is equivalent to [I call theta(x) = g(x) for ease of writing]
2xg' + 3g = f'' .
You get this by differentiating twice. I suggest you finish your HW
yourself by solving the above, substituting back into the Volterra
equation, and determining whether the result is consistent.
-- 
Julian V. Noble
Professor Emeritus of Physics
j...@lessspamformother.virginia.edu
    ^^^^^^^^^^^^^^^^^^
http://galileo.phys.virginia.edu/~jvn/
   "For there was never yet philosopher that could endure the 
    toothache patiently."  
        -- Wm. Shakespeare, Much Ado about Nothing. Act v. Sc. 1.