Systems of Equations - Substitution

Solve:
y = -1x - 5
4x - 8y = 4

• (-3, -2)
• (5, -7)
• (3, 9)
• (-5, 4)

Tags

CCSS.HSA.REI.C.6

CCSS.8.EE.C.8B

Solve:
y = 7x + 9
2y + 2x = -18

• (5, 0)
• (9, 18)
• (-2, -5)
• (1, 16)

Tags

CCSS.HSA.REI.C.6

CCSS.8.EE.C.8B

Solve:
y=8x+1
y=6x+3

• (1, 9)
• (4, 14)
• (0, 1)
• (2, 4)

Tags

CCSS.HSA.REI.C.6

CCSS.8.EE.C.8B

What is the solution to this system?
y = 2x + 1
y = 4x - 1

• (1,3)
• (-1,-3)
• (-1,3)
• (3,1)

Tags

CCSS.HSA.REI.C.6

CCSS.8.EE.C.8B

What is the value of the y-coordinate of the solution to the system of equations 
x - 2y =1
x + 4y =7 

• 1
• -1
• 3
• 4

Tags

CCSS.HSA.REI.C.6

CCSS.8.EE.C.8B

CHALLENGE: Three equations.
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

Tags

CCSS.HSA.REI.C.6

Find the solution, (y, x, z) to the following:

x - 2y - 3z = 4

y = -6

2x - 3y - z = 2

• (-8, -6, 0)

• (-6, -8, 0)

• (-6, 8, 0)

• (-8, 0, 6)

Find the solution (b, w,y) to the following:

4b + 4w + 6y = 38

5b + 6w = 44

4b = 16

• (4, 4, 1)

• (4, 1, 4)

• (4, 8, 1)

• (1, 4, 4)

find the solution(x, y, b)

2b + x + 3y = 25

6b = 12

b + 2x = 14

• (6, 5, 2)

• (2, 6, 5)

• (2, 4, 2)

• (6, 1, 2)