Substitution vs Elimination in Solving Systems of Equations

Question

When solving systems of equations, is it more efficient in terms of time to solve it using substitution or elimination, and what are your reasons for saying so?

Answer 1

In my experience, elimination. But usually with systems of equations in three or more variables I would use elimination first then substitution afterwards.

Answer 2

Substitution is faster when you dealing with homogeneous equations and in rest of the cases, elimination is quite faster and efficient.