Solving Linear Systems with Elimination Techniques

The video tutorial introduces the elimination method for solving linear systems algebraically. It outlines the steps involved, such as aligning variables and canceling coefficients, and provides multiple examples to illustrate the process. The tutorial also covers advanced techniques for handling complex systems and concludes with an application problem to demonstrate real-world usage.

What is the first step in the elimination method?

• Decide which coefficients to cancel out

• Make sure all variables are lined up

• Substitute the solution back into the other equation

• Add the two equations

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CCSS.8.EE.C.8B

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Which of the following pairs are considered opposites in the elimination method?

• 2 and -2

• 5 and 5

• 3 and 3

• 1 and 1

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CCSS.8.EE.C.8B

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In the first example, what do you get when you add 3x and 5x?

• 6x

• 8x

• 7x

• 9x

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CCSS.7.EE.A.1

After finding x = 2 in the first example, which equation is used to find y?

• The equation with no negatives

• Any of the original equations

• The equation with the highest coefficient

• The equation with the lowest constant

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CCSS.8.EE.C.8B

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In the second example, which variable is chosen to cancel out?

• Neither x nor y

• Both x and y

• y

• x

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CCSS.8.EE.C.8B

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What is the solution to the second example problem?

• (0, 0)

• (0, 6)

• (6, 6)

• (6, 0)

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CCSS.8.EE.C.8B

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In the third example, what is done to make the y's cancel out?

• Subtract the equations

• Multiply one equation by -1

• Divide one equation by 2

• Add the equations directly

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CCSS.8.EE.C.8B

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What is the final solution for the third example?

• (2, -1)

• (2, 1)

• (1, -2)

• (1, 2)

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CCSS.8.EE.C.8B

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In the fourth example, what is the purpose of multiplying the second equation by -2?

• To find the constant term

• To simplify the equation

• To make the x's cancel out

• To make the y's cancel out

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CCSS.8.EE.C.8B

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What is the final solution for the fifth example problem?

• (5, -3)

• (3, -5)

• (5, 3)

• (3, 5)

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CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6