Solving Systems of Equations by Elimination with Addition and Subtraction

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Tags

CCSS.8.EE.C.8C

• 30 minutes

• 45 minutes

• 60 minutes

• 90 minutes

Tags

CCSS.8.EE.C.8C

• No Solution

• (2,0)

• (-4,0)

• (0,0)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

• (-2,0)

• (0, -2)

• (2,0)

• (0,2)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

• (1,3)

• (-1,3)

• (-1,-7)

• (1,-7)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

• (1, -1)

• (0, -1)

• (1, 1)

• (-1, -1)

Tags

CCSS.HSA.REI.C.9

Using the elimination method, what operation should you use to solve this system of equations?

-5x + 3y = 42

-2x + 3y = 32

• addition

• subtraction

• multiplication

• division

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Write the solution to this system of equations as a coordinate pair (x,y) with no spaces.

3x + y = 10

-x - y = -20

(a)  

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What are the three methods we learned to solve systems of equations?

• invention

• elimination

• distribution

• graphing

• substitution

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

The school that Stefan goes to is selling tickets to a choral performance. On the first day of ticket sales the school sold 3 senior citizen tickets and 1 child ticket for a total of $38. The school took in $52 on the second day by selling 3 senior citizen tickets and 2 child tickets. Which equations represents the system that could be used?

• 1s + 3c = 38
  2s + 3c = 52

• 3s + 1c = 38
  3s + 2c = 52

• s + c = 38
  s + c = 52

• 3s + 3c = 38
  1s + 2c = 52

Tags

CCSS.HSA.CED.A.3