Systems of Equations by Substitution Method

Solve the system by substitution. 
y = 2x − 11
2x − 8y = 4 

• (6, 1)
  

• (6, −1)
  

• (6, −4)
  

• Infinite number of solutions  

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system by substitution. 
−x + 5y = 12
y = −2x − 2 

• (−2, −7) 

• (−2, 2) 

• (−2, −2) 

• (2, −2) 

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

• A
• B
• C
• D

Tags

CCSS.8.EE.C.7B

Solve by substitution method
y = x + 24
y = -7x

• -3,21

• 3,21

• 2,21

• -2,0

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Which of the following will you do first to solve a system of linear equations by substitution method?

• get x by itself

• get y by itself

• get either variable by itself

• add the equations together

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

• 16

• 24

• 4

• 6

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Rob is solving the system shown. What is the solution?

• (-1, 3)

• (3, -1)

• There is no solution.

• There are infinitely many solutions.

Tags

CCSS.8.EE.C.8B

Solve the system using the substitution method.

• (1, -4)

• (1, 4)

• (-4, -7)

• (-7, -4)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system of equations using substitution:

y = 3x - 8

y = 4 - x

• (3,1)

• (1,3)

• (-3,1)

• (3,-1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6