solve(a + x - sqrt(x) ,x)



Hello,
 
What is the way to solve this with Maxima?
 
(%i1) solve(a + x - sqrt(x) ,x);
(%o1)      [x = sqrt(x) - a]
 
is there a way (may be some switch) to force Maxima to eliminate sqrt(x).
 
Thank.
 
 
Laurent.