![]() ![]() Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere. When other relatives and friends sought his tutoring, he moved his tutorials to YouTube, where he created an account on November 16, 2006. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.Algebra 1 Course: Algebra 1 > Unit 6 Lesson 2: Solving systems of equations with substitution Systems of equations with substitution: potato chips Systems of equations with …Khan Academy In 2004, Khan began tutoring his cousin, Nadia, in mathematics over the internet using Yahoo! 's Doodle notepad. Knan academyLearn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more.
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