# One more calc 3 problem

The question asks to find each sphere that passes through the point (5,1,4) and are tangent to all three coordinate planes.
How would I set that up?
I have no problem finding the equation of a sphere when they give the center point and the radius, of course, but what do I need to know to find these equations?

$$(x-s)^2+(y-s)^2+(z-s)^2=s^2$$