Assessment Solving by Elimination

 $3x-2y=12$  

 $2x+2y=-2$  

What variable will eliminate in the system? 

• x

• y

• both

• neither

    $7x+5y=-12$  
 $10x+5y=5$  

What does the second equation need to be multiplied by to get the y's to eliminate?

• 5

• 0

• -1

• 2

 $-8x+y=20$  
   $4x-3y=5$  

What does the second equation need to be multiplied by so that the x's will eliminate?

• 2

• -1

• 4

• 0

What would be the equation for the next step in solving the system by elimination? 

    $2x-y=-15$   
 $-2x-4y=30$  

•  $-3y=-45$  

•  $-5y=-45$  

•  $3y=15$  

•  $-5y=15$  

Solve for x:

  $\ x-y=-19$  
 $5x+y\ =\ 1$  

•  $x=-4$  

•  $x=-3$  

•  $x=5$  

•  $x=6$  

Solve by elimination:

3x+7y=23

-3x-7y=-17

• No solution

• (0, 3)

• (-3,3)

• (3,3)

Solve by elimination:

7x+y=-9

-3x-y=5

• No solution

• (-1,8)

• (-2,-3)

• (-1,-2)

Solve by elimination:

-x+2y=17

2x+2y=-10

• Infinite Solutions

• (-9,4)

• (-9,-4)

• (9,-4)

Solve by elimination:

4x-6y= -6

-2x-12y= -12

• (0,1)

• (1,0)

• (1,1)

• (0, 2)

Solve by elimination:

2x+9y= -7

6x-3y= 9

• (-1, -1)

• (2,-1)

• (1,1)

• (1,-1)