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Solving Systems by Substitution Steps

Authored by Anthony Clark

Mathematics

8th Grade

CCSS covered

Solving Systems by Substitution Steps
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13 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

Which option shows the CORRECT substitution for this system?

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

Which option shows the CORRECT substitution for this system?

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

Which option shows the CORRECT substitution for this system?

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

Which option shows the CORRECT substitution for this system?

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

Infinite number of solutions

(0, 7)

(-5, -7)

(5, 7)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

6.

REORDER QUESTION

1 min • 5 pts

Put the steps for solving by SUBSTITUTION in order:

Plug the resulting expression into the other equation

Plug that number into the other equation

Solve for the first variable

Solve for the second variable

Solve one equation for x or y

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

7.

DRAG AND DROP QUESTION

1 min • 2 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(​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

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