Substitution

y = 3x
2x + y = 20

• (4, 8)
• (3, 9)
• (2, 6)
• (4, 12)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the solution to the system?
8x + 4y = 12
y = -2x + 3

• (0,3)
• (3,0)
• No solution(parallel lines)
• Infinitely many solutions

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

• (1, 9)
• (4, 14)
• (0, 1)
• (2, 4)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve:
x = -3y - 17
2x + 3y = -7

• (1, -20)
• (3, 0)
• (-5, -2)
• (10 , -9)

Tags

CCSS.HSA.REI.C.9

Solve each system by substitution.
y = 5
-7x + 4y = 20

• (5,0)
• (0, 5)
• (-5,0)
• (0, -5)

Solve each system by substitution.
y = 6
-2x + 3y = 24

• (-3,6)
• (6, 3)
• (0,0)
• (5, 0)

Solve each system by substitution.
y = -5x - 8
y = -6x - 9

• (-1,3)
• (0,9)
• (-3,6)
• (-1, -3)

This system has _____ solutions

• No
• 1
• 2
• Infinitely many

Tags

CCSS.8.EE.C.8B

y = -2x + 18
y = 8

• (5, 8)
• (-5, 8)
• (2, 8)
• (-2, 8)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve by substitution.

y = 2x + 1

y = 4x - 1

• (1,3)

• (-1,-3)

• (-1,3)

• (3,1)