Quiz - Solving Simultaneous Equations via Elimination

4x +  8y = 20
-4x + 2y = -30
Which variable will be eliminated?

• The  x
• The  y
• The  z
• The unknown

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the value of the y-coordinate of the solution to the system of equations 
x-2y=1
x+4y=7 

• 1
• -1
• 3
• 4

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Which variable will be eliminated from the system:

2x + 3y = 5

x + 3y = 7

• y

• x

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve:

3x - y = 11

x + y = 5

• x = 4

  y = 1

• x = 4

  y = -1

• x = -4

  y = 1

• x = -4

  y = -1

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system of equations below (*):

 $2x-3y=8$  
 $-2x+4y=-12$  

•  $\left(-2,-4\right)$  

•  $\left(-2,4\right)$  

•  $\left(2,-4\right)$  

•  $\left(2,4\right)$  

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve:
 $3x-4y=26$  
 $2x-4y=20$  

• x = 6

  y = -2

• x = -6

  y = -2

• x = -6

  y = 2

• x = 6

  y = 2

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Using the simultaneous equations 7x+7y=-42 and 4x+9y=-14, find the solution, giving your answer as a coordinate pair

• (-7, 2)
• (-8, 2)
• (-8, 3)
• (2, -8)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Using the simultaneous equations 1x+8y=12 and 4x+10y=4, find the solution, giving your answer as a coordinate pair

• (-3, 2)
• (-4, 1)
• (-4, 2)
• (2, -4)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system by elimination.

 $5x+8y=-12$  
 $3x+5y=-7$  

• (1, -10)

• No solution

• (-4, 1)

• (1, 10)

Tags

CCSS.8.EE.C.8B

Which method of solving simultaneous questions do you find easier?

• substitution

• elimination

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6