Question

When solving systems of equations, how do you determine what method to use?

Answer 1

It depends on the system.

Answer 2

If you have one variable plainly in terms of the other, like y = 3x -4, then use substitution.

Answer 3

However, if you have two equations where the variables have the same or similar signs, then use elimination.

Answer 4

And if you're lazy, use graphing with a graphing calculator. Or WolframAlpha, alternatively.