3.8 Solving Systems of Equations by Substitution

Solve this system of equations. 
y = 2x + 1
y = 4x - 1

• (1,3)
• (-1,-3)
• (-1,3)
• (3,1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

7x + y = -20
y = 3x + 10

• (-3, 1)
• (-1, -3)
• (-3,-7)
• (-1,7)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

• (3,-1)
• (-3,-1)
• (1,2)
• (-1,2)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

y = 5x + 1
y = 3x + 13

• (6, 31)
• (31, 6)
• (4, 21)
• (2, 11)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system of equations.

• (10, 3)

• (6, 3)

• (15, 3)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve each system of equations.
y = 3x - 11  
2x + 3y = 0

• (-2,3)
• (-3,2)
• (3,-2)
• (2,-3)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the solution to this system?
y = x + 5
4x + y = 20

• (3,8)
• (8,3)
• (0,2)
• (2,0)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system of equations.
y = 4x+1
3x + 2y = 13

• (1, 5)
• (5, 1)
• (0.25, 2)
• (2, 0.25)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system by substitution. 
3x − 2y = 7 
y = 2x − 7 

• No solution 
•  (7, 7)  
•  (−7, −7)  
•  (−7, −3)  

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system by substitution.

y = 2x − 11

2x − 8y = 4

• (6, 1)

• (6, −4)

• (6, −1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6