Question 861099
The directions for the problem means, Find what is p, just a chosen variable, so that {{{highlight_green(p+(3/4)x^5+x^4-13x^2-5x+3=k*x^3)}}}.
Solve for p.  

The directions do not contain more information about the term of degree three, so k could be any real number you choose.  JUST solve for p; and you will have your result.  You need to be able to use additive inverses, a very typical skill in basic algebra.