Substitution Equations

Solve using substitution.
x + 2y = -3
x - y = -12
What is the sum of x and y?

• -6

• -2

• 18

• 15

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve using substitution.
2x - 2y = 2
y = -5x + 14
What is the sum of x and y?

• 9

• 4

• 6.5

• 3.25

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

x + y + z = 4
x = -2y
z = -3y
Solve the system of equations using substitution.

• x = 2
  y = -1
  z = 3

• x= -5
  y = 3
  z = 1

• x = 10
  y = -2
  z = 0

• x= 4
  y = 1
  z = -1

What is the solution to this system?
x= 7 - 2y
2x + y = 5

• (-1,4)

• (4,-1)

• (1,3)

• (3,1)

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

What is the solution to this system?
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

What is the solution to this system?
y = x
3x - 2y = 3

• (1,1)

• (3,3)

• (-2,0)

• (0,-2)

Tags

CCSS.HSA.REI.C.7

What is the solution to the system of equations? 
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

What is the solution to the system?
x - 2y = 2
3x + 4y = 3

• (1.4, -0.3)

• (3.1, 5)

• (-2.5, 3.5)

• (6.9, 1.02)

Tags

CCSS.HSA.REI.C.9

What is the solution to the system?
2x - 2y = 2
y = -5x + 14

• (4, 5)

• (2.5, 1.5)

• (1.5, 5)

• (1, 2.25)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6