Elimination Techniques with Addition and Subtraction

This video tutorial covers the elimination method for solving systems of equations. It begins with an introduction to the method, followed by examples using addition and subtraction to eliminate variables. The video concludes with a practice problem for students to solve independently.

What is the third method introduced for solving systems of equations?

• Graphing

• Substitution

• Matrix Method

• Elimination

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CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

In the elimination method, what is the first technique discussed?

• Multiplication and Division

• Addition and Subtraction

• Graphing

• Matrix Method

Tags

CCSS.8.EE.C.8B

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What is the value of x when solving the system using addition in the first example?

• 4

• 3

• 5

• 2

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

In the word problem example, what is the first equation formed?

• 2x + y = 18

• 4x - y = 12

• 2x - y = 12

• x + y = 18

Tags

CCSS.8.EE.C.8B

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What is the value of y in the word problem example after solving the system?

• 5

• 8

• 6

• 7

Tags

CCSS.8.EE.C.8B

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In the subtraction example, what is the resulting equation after eliminating the variable T?

• 4S = -16

• -4S = -16

• 5S = -16

• -5S = -16

Tags

CCSS.8.EE.C.8B

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What is the value of S in the subtraction example?

• 4

• 5

• 3

• 2

Tags

CCSS.7.NS.A.1C

What is the value of T in the subtraction example?

• -5

• -8

• -6

• -7

Tags

CCSS.7.NS.A.1C

What is the final solution point in the subtraction example?

• (5, -6)

• (5, -7)

• (4, -7)

• (4, -6)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

In the practice problem, what is the first equation given?

• 7b + 8c = 7

• 8b + 3c = 11

• 8b + 7c = 7

• 3b + 8c = 11

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6