Intro to Solving Equations with Elimination

What type of methods did we see last week?

• Graphing

  Method

• Line

  Method

• Substitution

  Method

• Dividing

  Method

Now we will see Elimination Method! What does "Elimination" mean?

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Answer explanation

"Eliminate" looks like "Eliminar", which means "to get rid of".

What is the result?

• 5x

• 1x (or x)

• -6x

What is the answer here?

• -10y

• 3y

• 7y

Let's put it together! What would the result be?

• -6x - 10y

• 1x + 3y

  (x + 3y)

• 5x + 7x

What is the result of this?

• 6x - 3y

• 40x + 4y

• 14x + 5y

What is the best answer for this?

• -13x

• -x - 16y

• 42x - 40y

Let's add one more term! What is the best answer now?

• -13x = -52

• -x + 16y = -12

• 42x - 40y = 640

If -13x = -52, then what is x?

Okay, now: Equation #1 and #2 have to match.

What can we do so that they match?

• Let's subtract so that we can get matching numbers!

• Let's multiply #2 by 2 to match #1!

• Let's add so we can get matching numbers!