Finding missing terms in arithmetic sequence #1

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Thank you so much, , this helped me a lot with my test

hassanalabri
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Boi in confused

My brain: this is your brain in I get to confused I will explode

blogstudios
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I don't understand how you can just switch equal signs around and turn them into plus signs, and make negatives into positives.

gojira
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this video can't tell if 1st term is missing

alinazeerranjha