Setting Up One Step Equations From Word Problems

Javier has saved $55 toward the purchase of an IPOD. The IPOD costs $145. Which equation represents the amount Javier needs to save to by the IPOD?

• 55 + x = 145

• 145x = 55

• 55 - x = 145

• 145 (55) = x

In 2010, a tree was 8 feet tall. In 2011 the tree was 14 feet tall. Which equation would be used to find how many feet the tree grew?

• f + 8 = 14

• f - 8 = 14

• f/8 = 14

• 8f=14

Darshany bought three candy bars for a total of $18.00. How much did each candy bar cost? Write an equation to solve this problem. Use c as your variable.

• 18c=6

• c + 6= 18

• c +18 = 6

• 3c=18

Select the equation that best represents the situation:

Josiah scored 37 points. This was 5 points more than Alex scored.

• 37 + 5 = k

• k - 5 = 37

• k + 5 = 37

• 5k = 37

• A

• B

• C

• D

Which ONE STEP equation represents this problem: Terrance types 80 words per minute. If he typed 240 words, for how many minutes was he typing?

• ²⁴⁰ / ₈₀ = m

• 80m = 240

• 240 - m = 80

• 80 + m = 240

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Kylie and Ricardo decide to start a dog watching business for their neighborhood. 

Kylie thinks it would be best to charge customers $27 for a membership and then $5 per time they walk a dog. 

Ricardo thinks it would be best to charge $8 per dog walk. 

Write an equation to represent the number of walks, x, when the total cost is the same (set the two expressions equal to each other).

Mathematical Equivalence

ON

Which ONE STEP equation represents this problem: A store is offering a $200 discount on all new cell phone purchases. If Marty paid $650 for his phone, what was the original cost of the phone?

• 200c = 650

• 650 - c = 200

• 200 + c = 650

• c - 200 = 650

Each month, Olin’s cell phone plan costs $34.99, plus $12.95 per GB of data that he uses. His bill this month was $60.89. Which equation can be used to find the amount of data (d) Olin used this month?

• 34.99d +12.95 = 60.89

• 34.99 + d = 60.89

• 34.99 - 12.95d = 60.89

• 34.99 + 12.95d = 60.89