Question

When is best to use each way: Substitution, Graphing, and Elimination, when solving Linear Equations?

Answer 1

I'd suggest you choose a couple of problems involving simultaneous equations (i. e., systems of equations) and try solving each one using substitution and then elimination. This experiment may very well help you to answer your own question. When I need precise answers, I choose substitution or elimination over graphing, because graphical solutions can be imprecise unless you draw big, clear graphs with carefully spaced scale divisions on the x- and y-axes.

Answer 2

But, when is it best to use elimination over substitution and vise versa.

Answer 3

If you're working with a system of equations that have simple, integer coefficients, elimination may be faster than substitution. Substitution is, I'd say, the old standby, because it always works and is precise. Again, I suggest that YOU experiment and come to your own conclusions that way.

Answer 4

Thanks! You're the best. .3.