take some brooms
equivalence principles
How to start with solving sets of equations? What are equivalence principles?
Brooms can solve the problem...
Because isn't the crossing of two brooms a different thing than the solution of a set of equations? And if I hold a third broom so that it goes through the same point I might is well remove one of the first two.
- Why should I take a third broom?
- How shoulf I hold it to define more easily the crossing point?
