Solving Systems of Equations with Elimination Method

The video tutorial explains how to solve systems of equations using the elimination method. It covers three examples, demonstrating how to manipulate equations by multiplying or dividing to achieve the same or opposite coefficients, allowing for elimination of variables. The tutorial emphasizes understanding the process and encourages practice.

What is the primary purpose of using the elimination method in solving systems of equations?

• To substitute one equation into another

• To find the least common multiple

• To align the coefficients for easier elimination

• To graph the equations

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CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

In the first example, what operation is performed on the first equation to align the coefficients?

• Division by 2

• Subtraction from the second equation

• Multiplication by 2

• Addition with the second equation

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CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

After aligning coefficients in the first example, what is the next step in the elimination process?

• Subtract the equations

• Add the equations

• Multiply the equations

• Divide the equations

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CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

How is the variable 'x' solved in the first example?

• By division

• By subtraction

• By addition

• By multiplication

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CCSS.HSA.REI.A.1

What is the final step after solving for 'x' in the first example?

• Substitute 'x' into the first equation

• Substitute 'x' into the second equation

• Multiply the result by 2

• Divide the result by 2

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CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

In the second example, why do we multiply both equations?

• To eliminate 'y' from both equations

• To simplify the equations

• To align the coefficients of 'x'

• To prepare for addition of equations

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CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the result of adding the equations in the second example?

• An equation in terms of 'x'

• An equation that cannot be simplified further

• An equation in terms of 'y'

• A simplified equation with no variables

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CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

In the third example, what operation is performed on the second equation to simplify it?

• Division by 2

• Subtraction from the first equation

• Multiplication by 2

• Addition with the first equation

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CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

After simplifying the second equation in the third example, what is the next mathematical operation?

• Multiplication of the two equations

• Division of the two equations

• Subtraction of the two equations

• Addition of the two equations

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CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the final step in solving the system of equations in the third example?

• Substitute 'y' into the first equation

• Substitute 'y' into the second equation

• Divide the result by 2

• Multiply the result by 2

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CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6