Now it's time to add another way to solve a system of equations, ELIMINATION. In order to eliminate a variable in an equation, you should follow these steps.
Obtain coefficients that differ only in sign.
Add equations to eliminate a variable.
Back substitute to solve for second equation.
Check your solution.
Here's an example.
The process of elimination can also be applied to real life situations, such as one dealing with the speed of an airplane with a headwind compared to the speed of an airplane with a tailwind.
Here's an example.
And that's how you use elimination to solve a system of equations. So far second semester is good! Hopefully we can keep it up!
Good job Axie, but always remember to check your solution!
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