Solving Systems of Equations by Elimination

Solve by elimination:
4x+9y=28
-4x-y=-28

• (-7,0)

• (6,0)

• (-6,0)

• (7,0)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve by elimination:
7x+y=-9

-3x-y=5

• No solution

• (1,8)

• (-2,-3)

• (-1,-2)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What would be the first step in finding the solution with elimination?

• cross out the 3y and -3y

• cross out the 4x and x

• change all the signs of the second equation

• add 1 and -11

Tags

CCSS.HSA.REI.C.6

CCSS.8.EE.C.8B

Which variable will be eliminated?

• x

• y

Tags

CCSS.HSA.REI.C.6

CCSS.8.EE.C.8B

a method to solving a system of equations by getting rid of one of the variables first to solve for the other variable. 

• Systems by Graphing

• Systems by Substitution

• Systems by Elimination

• Systems by Drawing

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system of equations by elimination: \[ \begin{cases} 2x + 3y = 6 \\ 4x - 3y = 12 \end{cases} \]

Tags

CCSS.HSA.REI.C.6

CCSS.8.EE.C.8B

Solve the system by elimination. Show all work.

3x + y = 19

2x - y = 6

• (5, 14)

• (4, 5)

• (5, 4)

• (14, 5)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

• A

• B

• C

• D

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

• (-2,2)

• (2,-2)

• (-2,-2)

• (-2, 1/2)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system by elimination

• (8,-3)

• (3,8)

• (16,3)

• (8,3)

Tags

CCSS.HSA.REI.C.6

CCSS.8.EE.C.8B