Addition and Subtraction Equations

Question 1

Which equation is equivalent to 4.5 = 2a?

Revolt · Accepted Answer

B: a = 2.25

Question 2

x = .

Revolt · Accepted Answer

4.3

Question 3

What property was used to solve the equation?

Revolt · Accepted Answer

D: Multiplication property of equality

Question 4

Sara is having a dinner party for four friends and needs to reduce the serving size of the meatloaf recipe. She uses the equation . How many servings did the recipe originally make?

Revolt · Accepted Answer

D: 20

Question 5

Hector spent 34 of his money the day after he cashed his paycheck of $50. Let m represent the amount of money Hector spent. Which equation matches the word problem? How much money did Hector spend?

Revolt · Accepted Answer

C: 3/4 (50) = m

Question 6

Jen has a newer car than Amelie, and it has the miles of Amelie’s car. Amelie’s car has 45,000 miles. Which of the following equations model this situation? Select all that apply.

Revolt · Accepted Answer

A: 3(m) = 45,000; C:

Question 7

Which equation and solution is correct?

Revolt · Accepted Answer

D: , and the total bill was $132.50.

Question 8

Explain the process to solve the equation. Use proper vocabulary in your explanation.

Revolt · Accepted Answer

Your goal is to isolate the x. This is a multiplication problem, so use the inverse operation, which is division. Divide both sides of the equation by 14 by multiplying by the reciprocal, 4. (− 58)(4) is − 52. Use substitution to check the answer. x = − 52

Question 9

What is Clara’s error?

Revolt · Accepted Answer

D: The solution is , not –14.

Question 10

How much money did Hector spend? $50✔ $37.50$25$12.50

Revolt · Accepted Answer

B: $37.50

Addition and Subtraction Equations Answers

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