Solving Systems of Equations with Elimination

What is essential to know before learning the elimination method?

• Linear equations, solving equations, and systems of equations

• The Pythagorean theorem

• Trigonometric identities

• The history of algebra

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CCSS.8.EE.C.8B

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What method was exclusively discussed in this tutorial?

• Graphing

• Substitution

• Matrix

• Elimination

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CCSS.8.EE.C.8A

How is the solution set for a system of equations represented in a graph?

• The lowest point of the lines

• The highest point of the lines

• The point where the lines are parallel

• The point where the lines intersect

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CCSS.8.EE.C.8B

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Why was variable B chosen for elimination in the first demonstration?

• Because it has the highest coefficient

• Due to its negative coefficient

• It had the same coefficient but opposite signs

• Random selection

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CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the result of A after eliminating B in the first example?

• A = 4

• A = -4

• A = 3

• A = -3

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CCSS.8.EE.C.8B

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What is the primary goal of the elimination method?

• To find the highest common factor

• To cancel out one variable

• To graph the equations

• To substitute variables

In the second demonstration, what was the LCM used for both X and Y?

• 6

• 5

• 4

• 15

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CCSS.6.EE.B.7

What was the final value of Y in the second demonstration?

• Y = 3

• Y = 4

• Y = 5

• Y = 6

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CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

In the final demonstration, what was the LCM for the coefficients of X?

• 2

• 4

• 6

• 15

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CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

After eliminating X in the final demonstration, what was the value of Y?

• 2

• 3

• 4

• 5

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CCSS.8.EE.C.8B

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