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Example: two-step equation with numerator x | Linear equations | Algebra I | Khan Academ - YouTube

Velázquez, Las Meninas, c. 1656 - art history video: Speakers: Dr. Steven Zucker, Dr. Beth Harris - More free art history lessons online at: https://www.khanacademy.org/humanities/art-history/art-history-1600-1700-the-baroque/spain/v/vel-zquez--las-meninas--c--1656?v=IiTtGENiVOA

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What is pre-algebra? If you want to be a smart-aleck, I guess that any form of arithmetic before algebra could be considered "pre-algebra." But Khan Academ

Pieter Bruegel the Elder, Hunters in the Snow (Winter), 1565 - Smarthistory, Art History at Khan Academy video https://www.youtube.com/watch?v=Pj3HdzOR2pY

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Back in June we told you that we’d be experimenting with a learning lab, and today marks the opening of the Khan Lab School, which will be composed of a small cohort of around 30 students. Khan Academ