Using Elimination to Solve Systems of Equations Practice

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

2x + 2y = -2

3x - 2y = 12

• you cannot solve this using elimination

• cross out the 2x and 3x

• Add the like terms. The y terms will cancel out.

• change to slope intercept form and graph

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system using elimination:

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

Solve the system:
x + 6y = 17
x - 3y = 8

• (5, 2)
• (11, 1)
• (1, 11)
• no solution

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Which variable will be eliminated?

• x

• y

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Find x and y using the elimination method
2x+3y=7
2x+7y=11

• x=-2, y=-1
• x=2, y=-1
• x=2, y=1
• x=-2, y=1

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

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 the system by elimination:
7x+y=6
10x+y=12

• (1,-1)
• (2,8)
• (2, -8)
• (1, 15)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

8x − 9y = ^–11

^–8x + 7y = 5

• (2,3)

• (-2,-3)

• (3,2)

• (-3,5)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

^–2x − y = ^–3

^–2x − 3y = ^–17

• (2,-7)

• (-2,7)

• (-5,8)

• (5,8)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve using Elimination Method:

x - y = 11

2x + y = 19

• (10,-1)

• (-1,10)

• (3,-4)

• (6,7)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6