Substitution and Elimination

Solve for x and y.
2x − 3y = −1
 y = x − 1

• (-2,-3)

• (0,-1)

• (3,4)

• (4,3)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system of equations:
-12x-4y= -8 
  6x+2y= 4

• no solution 

• (0,0)

• infinitely many solutions 

• (4,0)

Tags

CCSS.8.EE.C.8B

Solve the system of equations:
y=5x+3
y=-2x-4

• (2,-1)

• (-1,-2)

• (1,-2)

• (-2,-1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system of equations:
y = 8x + 2
y = -x - 7

• (1, 10)

• (-1, -6)

• (2, 7)

• (9, 9)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system of equations:
4x+8y=20
-4x+2y=-30

• (-7,1)

• (2,-5)

• (-2,5)

• (7,-1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system of equations:
3x + 2y = 16
14x + 2y = 38

• (-2,5)

• (-2,-5)

• (2,-5)

• (2,5)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system of equations:
−6x + 6y = 0
9x − 8y = 4 

• (4, −9)
  

• Infinite number of solutions 

• (−9, 4)
  

• (4, 4) 

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system of equations. What is the value of the X? 
3x -  y  =  5
  x + y  =  3

• X = 2 

• X = 1 

• X =  -1 

•  X  =  -2

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system of equations:
−8x − 10y = 20
 8x  +  6y =   4 

• (-5,-6)  

• (6, 5) 

• (−6, −5) 

• (5, −6) 

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Which is the best method for solving this system of equations?

• Substitution

• Elimination

• Equal Values

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6