Solving Systems of Equations: Substitution and Elimination Techniques

The video tutorial covers solving systems of linear equations using substitution and elimination methods. It begins with an introduction to the concepts, followed by a detailed explanation of the substitution method, including examples. The tutorial then shifts to the elimination method, demonstrating how to solve systems with equations in standard form. Advanced techniques in elimination are discussed, such as transforming equations to eliminate variables. The video concludes with special cases in systems of equations, explaining scenarios with no solution or infinitely many solutions.

What is the fee for members in the example problem discussed?

• $6

• $28

• $2

• $20

In the substitution method, what do you substitute into the other equation?

• An equation

• A value for a variable

• A variable

• A constant value

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the final solution for the system where y equals one-half x plus five?

• (7, 4)

• (4, 7)

• (5, 2)

• (2, 5)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the first step in the elimination method?

• Isolate one variable

• Add the equations directly

• Transform one equation

• Subtract the equations

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the solution for the system where 4x plus 8y equals 12 and 5x minus 8y equals 105?

• (13, -5)

• (5, 13)

• (12, 105)

• (105, 12)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What should you do if adding the equations directly does not eliminate any variables?

• Subtract the equations

• Transform one of the equations

• Isolate one variable

• Multiply both equations by the same number

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the solution for the system where one equation is multiplied by negative 2 to eliminate a variable?

• (-6, 0.5)

• (0.5, -6)

• (-0.5, 6)

• (6, -0.5)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What does it mean if you end up with a statement like '0 = 0' when solving a system of equations?

• Incorrect solution

• No solution

• Infinitely many solutions

• One solution

Tags

CCSS.8.EE.C.8B

What does it mean if the lines of a system of equations are parallel?

• They have no solution

• They are the same line

• They intersect at one point

• They have infinitely many solutions

Tags

CCSS.8.EE.C.8A

What is the result if two equations in a system are the same line?

• Incorrect solution

• Infinitely many solutions

• One solution

• No solution

Tags

CCSS.8.EE.C.8A