Section 3.9 Solving Systems

Solve by graphing.
y = 2x + 1
y = 4x - 1

• (1,3)
• (-1,-3)
• (-1,3)
• (3,1)

Solve this system of equations by graphing. 
y = 2/3x - 2
y = -x + 3

• (0,3)
• (0,-3)
• (3,0)
• (-3,0)

Solve the system by elimination.

-4x-2y=-12

4x+8y=-24

• (5,6)

• (6,-6)

• (6,-2)

• (4,-3)

Solve the system by elimination.  

−7x + 6y = 29
10x + y = 16 

• (1,6) 
• (−1,−3) 
•  (−3, −1) 
• (−1, 3) 

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system by elimination.

2x - 5y = 11

3x + 2y = 7

• ( 4 , -2 )

• ( 2, -2 )

• (3, -1 )

• ( 3, 1 )

What equation would be easiest to use for substitution?

2x + 3y = 14

x = 4y - 5

• 2x + 3y = 14

• x = 4y - 5

• Either one

Solve this system with Substitution.

2x+y=9

y=5x+2

• (1,7)

• (2,5)

• (-1,-3)

• (5,-1)

Solve this system with Substitution.

x = 7 - 2y

2x + y = 5

• (-1,4)

• (4,-1)

• (1,3)

• (3,1)

Solve this system with Substitution.

5x + 4y= −14

y = −7x − 15

• (-2, -1)

• (1, -2)

• (-2, 1)

• (-1, -2)