Error in solve, invalid arguments

restart:
h:=12:base:=7.8:A:=1.12:w:=1.5:
lY:=w/sin(A):
depth:=(base/2-lY)*tan(A):
#Set notation brackets - ignores this
#solve({tan(x)=2*(h-depth-y)/w, z=w*cos(A)+w*sin(A)/tan(A+x), uY+z+depth=h},{x, y,z});
solve(tan(x)=2*(h-depth-y)/w, z=w*cos(A)+w*sin(A)/tan(A+x), uY+z+depth=h,{x, y,z});

Error, (in solve) invalid arguments