Arithmetic series Finding the number of terms that sum to a given number

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The equation was supposed to be
2790=n(3+3n)

onesmusmwai
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This is a lifesaver. Gonna help so much with my next test. Thank you 🙏

MrMooseMan
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How did he go from +3n to -3n and he made a clear mistake of not minusing 2790 on both sides

saimhaider
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What if you get two n values that are positive, which value should you disregard?

heyyy
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How come it became 3-3n instead of 3+3n

melaies
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Finally a video with the proper explanatoin

rohit_sharma__
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Why did you used calculator?
Lol, I am finding a manual calculation

ClassyMLBBHighlights
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how did you get the 30 withou that sh*t calcu?

andreymirbiscayno
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This actually wasted my time, dude be clear, next time

halimacooks