a,b,c,d,x,f,g,h,k,p,q,r,s,u,v,l,m,n= var('a b c d x f g h k p q r s u v l m n')
f1 = ap+bq+c*r+1
f2 = ds+ux+f*v-1
f3 = gl+hm+k*n-1
f4 = as+bu+c*v
f5=al+bm+c*n
f6=dl+xm+f*n
f7=ap+ds+g*l-1
f8=bp+xs+h*l+2
f9=cp+fs+k*l-1
f10=aq+du+g*m
f11=bq+xu+h*m-1
f12= cq+fu+k*m
f13= ar+dv+g*n
f14= br+xv+h*n-2
f15= cr+fv+k*n+1
solve([f1==0,f2==0,f3==0,f4==0,f5==0,f6==0,f7==0,f8==0,f9==0,f10==0,f11==0,f12==0,f13==0,f14==0,f15==0],a,b,c,d,x,f,g,h,k,p,q,r,s,u,v)
I am trying to solve these 15 system of equations but I am not getting any result. Is there any wrong here?