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Solve Systems with Elimination Steps

Authored by Anthony Clark

Mathematics

9th Grade

CCSS covered

Solve Systems with Elimination Steps
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20 questions

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1.

DRAG AND DROP QUESTION

1 min • 2 pts

In this system x+3y=9 it'll be easiest to start by solving the first equation for x. The result of doing so is x=​9-3y. Fill in the blanks to plug that expression in and solve for y: 4(​9-3y)-2​y =-6 36-​12y-2y=​-6 36-​14y =-6 -14y=​ (a)   y=​ (b)  

-42

3

30

-3

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

2.

REORDER QUESTION

1 min • 5 pts

Put the steps for solving by ELIMINATION in order:

Subtract the equations to eliminate one variable

Make sure the equations are lined up

Solve for the remaining variable

Multiply one or both equations by a number to get common but opposite coefficients

Plug that number into either original equation and solve for the other variable

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

3.

DRAG AND DROP QUESTION

1 min • 2 pts

What is the solution to the system of equations?

4x-y=3

3x+y=4

(​ (a)   ,​ (b)   )

1

2

3

4

5

6

7

8

9

0

Tags

CCSS.HSA.REI.C.9

4.

DRAG AND DROP QUESTION

1 min • 5 pts

In this system

x+3y=9

4x-2y=-6

it'll be easiest to start by solving the first equation for x.

The result of doing so is x=​9-3y.

Fill in the blanks to plug that expression in and solve for y:

4(​ (a)   )-2​ (b)   =-6

36-​ (c)   y-2y=​ (d)  

36-​ (e)   =-6

9-3y

y

12

-6

14y

x

10y

x+3y

24y

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Solve using Elimination Method:

(-1,5)

(-7,5)

(7,5)

(3,5)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

4x+ 9y = 28

-4x -y = -28

(-7,0)

(6,0)

(-6,0)

(7,0)

(6,7)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

7.

MULTIPLE CHOICE QUESTION

1 min • 5 pts

Solve using Elimination Method:

4x + 9y = 28

-4x - y = -28

(-7,0)

(6,0)

(-6,0)

(7,0)

(6,7)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

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