Find the Missing Value Given the Mean on the Math GED

This video explains how to find the missing value when given the mean. Khan Academy models the GED questions this really well in their exercise.
Khan Academy exercise: www.khanacademy.org/math/ap-s...
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[@elexisavalanche2001]

Thank you😊

[@bonnykiser]

Your simply explanation is amazing! THANK YOU so much!

[@passtheged4834]

Glad it was helpful!

[@faustinembeh]

Yesss!!!!! I got it 👌🏿😘🙏🙏🙏🙏

[@latonyahall2086]

Hello do u respond I have a question

[@iankearns7875]

yes, how can I help?

[@latonyahall2086]

@@iankearns7875 I need help with a problem that states that 7 people bought sandwiches and one had 6 off how much is the sandwiches all together? Is that a percent/ discount word problem? It does say off but no percent sign in the sentence

[@iankearns7875]

@@latonyahall2086 can you share the full description?

[@latonyahall2086]

@@iankearns7875 if 7 Jose buys 8 sandwiches for his coworkers for $9.00 and has 6 off how much does the sandwiches cost ? Or how much does he pay?

[@iankearns7875]

@@latonyahall2086 Okay this is a rate or y=mx+b problem. Are you paraphrasing the question? It seems a little strange. Anyway, The rate or cost per sandwich (which is m) is what the question is asking for. So you would use $9 for the total which is y, in y=mx+b. so you have $9=m8-6. where m8 means m times 8. So now you have a two step equation to solve for m. First add 6 to both sides which leaves you with 15 on the left and just m8 on the right. Lastly divide both sides by 8 to get 15/8 which is $1.87 per sandwich. To check out the work, or to explain it differently. He bought 8 sandwiches at $1.87 per sandwich which would be ~$15. But he had a coupon for $6 off which means he only had to pay $9. Hope this helps.