6.3 Solving Systems Using Addition and Subtraction

Find the solution to this system.

4x + 8y = 20

−4x + 2y = −30

• (-1, 7)

• (-7, 1)

• (7, -1)

• (1, -7)

Tags

CCSS.HSA.REI.C.6

CCSS.8.EE.C.8B

Find the solution to this system.

4x+4y=4

3x+4y=10

• (7,-6)

• (-6,7)

• (6,7)

• (7,6)

Tags

CCSS.HSA.REI.C.6

CCSS.8.EE.C.8B

Solve the following system using elimination.

x+4y=(-4)

x+10y=(-16)

• (6,3)

• (4,-2)

• (-3,1)

• (-3,4)

Solve the system by elimination.  

−8x − 10y = 20
−8x − 6y = −4 

• Infinite number of solutions  
• (6, 5) 
• (−6, −5) 
• (5, −6) 

Tags

CCSS.HSA.REI.C.6

CCSS.8.EE.C.8B

Solve by elimination:
4x+9y=28
-4x-y=-28

• (-7,0)
• (6,0)
• (-6,0)
• (7,0)

Solve the system

-4x - 2y = -12

4x + 8y = -24

• (6, 0)

• ( 6 , -6 )

• ( -6 , 6 )

• ( 3 , -3 )

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

• (-5, -9)

• (9, 5)

• (5, 9)

• (-9, -5)

• (1, 4)

• (4, 1)

• (1, -4)

• (-4, 1)

• (4, -2)

• (-2, 4)

• (2, 4)

• (2, -4)

Solve the following using elimination.

-x + y= -11

2x+ y= 19

• (10,-1)

• (-1,10)

• (-1,-10)

• (-10,-1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6