Solving Systems with the Elimination Method

This video tutorial from Algebra Test Helper focuses on solving systems of equations using the elimination method, also known as the linear combination method. The instructor explains the importance of aligning variables in columns and creating opposite pairs to eliminate variables. The video demonstrates how to manipulate equations to form opposites and solve the system step-by-step. The tutorial concludes with a solved example and encourages viewers to explore more resources on the website.

What are the two primary methods for solving systems of equations in algebra?

• Elimination and Graphing

• Substitution and Elimination

• Graphing and Factoring

• Substitution and Factoring

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Why is it important to ensure that variables are aligned in columns?

• To avoid calculation errors

• To simplify the equations

• To easily identify and combine like terms

• To make the equations look neat

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What should you do if your system of equations is not in the correct format?

• Solve it using a different method

• Change the variables

• Rewrite it so that variables are aligned

• Ignore it and proceed

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CCSS.8.EE.C.8B

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What is the goal when creating opposite pairs in the elimination method?

• To eliminate one of the variables

• To simplify the equations

• To make the equations identical

• To find the solution directly

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If you have 5x in one equation, what would be the opposite term in the other equation?

• 5x

• -5x

• -10x

• 10x

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CCSS.8.EE.C.8B

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How can you manipulate an equation to create an opposite pair?

• By changing the variables

• By subtracting a constant from both sides

• By multiplying or dividing the entire equation by a number

• By adding a constant to both sides

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What is the purpose of multiplying an entire equation by a number in the elimination method?

• To make the equation longer

• To simplify the equation

• To create opposite pairs for elimination

• To change the solution

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CCSS.8.EE.C.8B

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After eliminating one variable, what type of equation are you left with?

• A linear equation with one variable

• A quadratic equation

• A system of equations

• An unsolvable equation

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Once you have found the value of one variable, what is the next step?

• Check the solution

• Substitute it back into one of the original equations

• Multiply it by a constant

• Rewrite the system of equations

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CCSS.8.EE.C.8B

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What is the final solution of the system in the example provided?

• x = -3, y = -5

• x = 3, y = -5

• x = -3, y = 5

• x = 3, y = 5

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