Elimination Method Using Addition and Subtraction

Solve by elimination

x+y=-4

x-y=2

• (1,2)

• (-1,-3)

• (4,5)

• (3,2)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What operation is used to ELIMINATE a variable?

• addition

• subtraction

• multiplication

• division

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system of equation by elimination.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What do you have to multiply the first equation by to have the x's be opposite and the same?

• 3

• 2

• -2

• -3

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system of linear equations by elimination.

-x + y = -13

-8x - 4y = -8

• (5, 8)

• (5, -8)

• (-5, -18)

• (-5, 8)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system:

8y+7x=-75

8y+9x=-5

• (-5, -5)

• (40, -35)

• (-5, 5)

• (35, -40)

• (-35, 5)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system of equations using the elimination method.

• (1,-6)

• (-6,1)

• (-1,6)

• (10,7)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Which method would be the most efficient?

• Graph (or set equal)

• Elimination

• Substitution
  

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

When you combine (ADD) these 2 equations, what do you end up with?

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

When solving systems of equations using the Elimination Method, which of the following statements are true?

• Both equations must be in Slope-Intercept Form.

• Both equations must be in Standard Form.

• It does not matter what Form both equations are in.

• Only one equation needs to be in Standard Form.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6