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### Course: Operations and Algebraic Thinking 222-226>Unit 2

Lesson 6: Two-step equation word problems

# Equation word problem: super yoga (2 of 2)

If you're coming to this video before seeing the previous one, back up! Otherwise, we're solving one-step equations to learn which Super Plan is the best value for our budget. Created by Sal Khan.

## Want to join the conversation?

• What is the point of taking a fraction of a session exactly?
• Given how he set it up, you might attend a fraction of a session if you only had time to go to part of a session. Say, you have 20 minutes before you need to run off to class, but the sessions are 40 minutes long. You want to do some yoga and decide you want to do that 20 minutes.
• Is there a specific way to determine the session that will cause you to break even with the money.
• Why can't you subtract before multiplying?
• You can, but you need to know the rules very well before doing so. If you do not, you will get the wrong answer. So, for now, use the rules you have been given.
• Just out of curiosity are you on like a tablet with a drawing plan?
• on it looks like the yoga persons head got cut off. anyone els
• Hi,
I had 54 = 20 + 8s which is right so far
Then instead of removing the 20 from both sides I divided by 8 which gave me the wrong answer.
Question : Where does it say we should remove the 20 before the 8 from the s side?
• You should always try to do the easiest first. For example, if you divided by 8 first, you'd have to divide the 20 too. If you removed the 20 first, you'd only have to divide the variable to isolate, and the remaining amount on the other side of the equals symbol!
• it was 54\$ but he divided and made it 34\$, which means that a monthly membership is better
• In the video (One-step equations word problems 2 Grade 6) Sal doesn't divide the 54\$. He subtracts the one time 20\$ membership fee from the equation because that 20\$ fee stays the same no matter how many sessions you attend. The only thing that changes is the amount you pay depending on the number of sessions which is the 8s. You would have to attend 5 or more sessions a month for the monthly membership to be the better choice.
• Couldn’t you just ask the staff at the yoga gym about which plan is better?
• what is the decimal for 1/4?
(1 vote)
• :D Let's try this:

Divide: 1/4 = 0.25 = 25%

Remember
- Divisor = 4
- Dividend = 1
----

0.25
------
4) 1.00
- 0
----
1 0
- 8
-----
2 0
- 2 0
------
0

Answer: 1/4 = 0.25