Elimination Method

When solving a system, if you get 3 = -5 this means

• (3, -5)

• infinitely many solutions

• all real numbers

• no solution

Tags

CCSS.8.EE.C.8B

When solving a system, if you get -5 = -5 this means

• (-5, -5)

• infinitely many solutions

• all real numbers

• no solution

Tags

CCSS.8.EE.C.8B

What would be a great first step to solving the following system using elimination:

-6x + 6y = 4

-6x + 3y = -12

• Multiply the bottom equation by 1

• Multiply the bottom equation by 2

• Multiply the top equation by 2

• Multiply the top equation by -1

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the following using elimination:

5x + y = 9

10x -7y = -18

• (4, 1)

• (4, 4)

• (1, 4)

• (1, 1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the following using elimination:

-x -7y = 14

-4x -14y = 28

• (0, -2)

• (0, 1)

• (-2, 0)

• (-2, 1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6