Abstract
This paper presents the solutions to the following nonlinear systems of rational difference equations: x(n+1) = ((x(n-3)y(n-4))/(y(n)(1 + x(n-1)y(n-2)x(n-3)y(n-4))), y(n+1) = ((y(n-3)x(n-4))/(x(n)(+/- 1 +/- y(n-1)x(n-2)y(n-3)x(n-4))) where initial conditions x(-delta), y(-delta)(delta = 4, 3, ... , 0) are nonnegative real numbers. Finally some numerical simulations are presented to verify obtained theoretical results.