Solving Systems of Equations by Substitution

Solve the system of equations:

y = x + 24

y = -7x

(*Hint: Set it up so -7x = x + 24)

• (-3, 21)

• (3, 21)

• (2, 21)

• (-2, 0)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system of equations:

y = -x - 10

y = 4x

(*Hint: Set it up so 4x = -x - 10)

• (2,8)

• (-1,-8)

• (-2,-8)

• (0,8)

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

Buzz graphed two lines in order to find the solution to a given system of equations.
What is the solution?

• (-1, 4)
• (1, -4)
• (-4, 1)
• (4, -1)

Tags

CCSS.8.EE.C.8B

^{What is the solution?} 

• 1
• -2
• (1, 2)
• (1, -1)

Tags

CCSS.8.EE.C.8A

Solve the system of equations:

2x + 3y = -5

x = y + 5

• (-4, 1)

• (2, -3)

• (6, 1)

• (8, 3)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system of equations:

y = 2x

x + y = 9

• (6, 3)

• (3, 6)

• (-3, -6)

• no solution

Tags

CCSS.HSA.REI.C.7

Solve the system by substitution.

-2x - 2y = 16

y = -8

• (0, -8)

• (-8, 0)

• (-16, -8)

• (-16, -8)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system by substitution:

-5x - 4y = -9

y = 6

• (3, 6)

• (6, -3)

• (-3, 6)

• (6.8, 3)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6