I have two coupled equations of the form

(a+ y)*exp(-i*k*x) + (b + y)*(-i*m*x) + (c + y)*exp(i*k*x) +( d + y)*exp(i*m*x) = e*y

(f+ y)*exp(-i*k*x) + (g + y)*(-i*m*x) + (h + y)*exp(i*k*x) +(j + y)*exp(i*m*x) = l*y

and need to solve for x,y, where a-f are real. Actually the coefficients are very long with many terms!

What is the best way to go about this?