
Solving Systems of Equations by Elimination
Authored by Anthony Clark
Mathematics
9th Grade
CCSS covered

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9 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
-3x+3y = 18
5x-3y = -26
answers in (x,y)
(4,2)
(-4,-2)
(-4,2)
(4,-2)
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What do you have to multiply the first equation by to have the x's be opposite and the same?
3
2
-2
-3
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the next step in solving this system by elimination?
2x + 3y = 9
5x + 3y = 21
Nothing - it is ready to go.
Multiply one equation by -1
Multiply the top equation by 3.
Multiply the bottom equation by 7.
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
4x + 8y = 20
-4x + 2y = -30
Which variable will be eliminated?
The x
The y
The z
The unknown
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
________________ is a set of two or more equations that have the same variables.
solution of a system
elimination method
system of equations
table
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Solve the system of Equation (x,y)
x + 4y = –3
x + 7y = –12
(-3,9)
(9,-3)
(3,9)
(9,3)
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The solution to a system of equations is any ordered pair that makes both equations true.
TRUE
FALSE
Tags
CCSS.HSA.REI.C.9
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