Solving Systems by Substitution Steps
Authored by Anthony Clark
Mathematics
8th Grade
CCSS covered
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13 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
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
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
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
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
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:
Solve for the second variable
Plug the resulting expression into the other equation
Plug that number into the other equation
Solve one equation for x or y
Solve for the first variable
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)-2y =-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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