Solving Equations Using Addition and Subtraction
Authored by Anthony Clark
Mathematics
7th Grade
CCSS covered
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
What is the first step to solve this equation? 5x + 6 = 10 + 3x + 4x
Add 4x to both sides of the equation
Combine the terms 3x and 4x on the same side of the equation
Add 5x and 6 to get 11x
Combine the terms 5x and 3x and 4x to get 12x
2.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
What is the first step to solve this equation?
2x + 3(5x - 7) = 47
Add 7 to both sides
Combine 2x and 5x
Distribute the 3 to 5x and - 7
Subtract 2x from 5x
Tags
CCSS.8.EE.C.7B
3.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
Find the error in the problem.
Should have added 19 to -1.
Should have subtracted 3k instead of adding 3k to both sides.
Should have gotten k = 20 since two negatives make a positve.
There is no error.
Tags
CCSS.HSA.REI.A.1
4.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
What is the first step to solve this equation? (3n - 4) + (-2 + 2n) = 9
Combine 3n and -4 and also combine -2 and 2n
Add 3n to both sides of the equation
Subtract 2n from both sides of the equation
Combine 3n and 2n and also combine -4 and -2
5.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
What is the next step to solve this equation?
3x + 6 = 10 + 7x
Add 6 to both sides of the equation
Add 10 to both sides of the equation
Add 7x to both sides of the equation
Subtract 7x from both sides of the equation
6.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
Which would NOT be an acceptable next step in solving this equation? −4x − 7 = 3x + 2
Subtract 2 from both sides
Combine -4x and 3x to make -1x
Subtract 3x from both sides
Add 4x to both sides
7.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
What should be the first two steps to solve this equation? 2x +4(3x + 6) = 90
combine 2x and 3x and then distribute the 4.
subtract 6 from both sides and then divide by 4
distribute the 4 and then combine like terms by addition
combine 2x and 3x and then subtract 6 from both sides
Tags
CCSS.8.EE.C.7B
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