Solving Systems by Elimination

What is the solution to the system?

• (2, -3)

• (-3, 2)

• (2, 3)

• (-4, 3)

Tags

CCSS.8.EE.C.8B

 $3x-2y=12$  

 $2x+2y=-2$  

What variable will eliminate in the system? 

• x

• y

• both

• neither

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

    $3x+y=-15$  
 $-3x-4y=30$  
Which variable will eliminate in the system?  

• x

• y

• both

• neither

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

     $7x+5y=-12$  
 $10x+5y=5$  
What does the second equation need to be multiplied by to get the y's to eliminate?

• 5

• 0

• -1

• 2

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

 $-8x+y=20$  
   $4x-3y=5$  
What does the second equation need multiplied by so that the x's will eliminate?

• 2

• -1

• 4

• 0

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What would be the equation for the next step in solving the system? (combine the equations)
    $2x-y=-15$   
 $-2x-4y=30$  

•  $-3y=-45$  

•  $-5y=-45$  

•  $3y=15$  

•  $-5y=15$  

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the equation for the next step in solving the system? 
 $5x-4y=-16$  
 $5x+4y=-14$  

•  $10x=-30$  

•  $5x=-30$  

•  $10x=-2$  

•  $x=-30$  

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve for x:

  $\ x-y=-19$  
 $5x+y\ =\ 1$  

•  $x=-4$  

•  $x=-3$  

•  $x=5$  

•  $x=6$  

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve for y:

 $-6x+5y=1$  
     $6x+4y=-10$  

•  $y=1$  

•  $y=-9$  

•  $y=-1$  

•  $y=9$  

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system by elimination:
 $x+y=6$  
 $6x-y=1$  

• (3, 3)

• (1, 5)

• (1, 3)

• (7, -1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6