Question 394632: Explain how you decide to use substitution or elimination to solve a system.
Answer by richard1234(7193)   (Show Source):
You can put this solution on YOUR website! It depends on the problem. Sometimes when it's easy to isolate x or y you can use substitution, and when one of the x coefficients factors nicely into the other x coefficient you can multiply by their quotient, add the equations to eliminate x (y is symmetric as well). You can use either method to solve any system of two linear equations, it takes a little practice to immediately decide which method is easier.
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