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Test en løsning til et ligningssystem

Vi tjekker, om (-1,7) er en løsning til ligningssystemet: x + 2y = 13 og 3x - y = -11. Lavet af Sal Khan og Montereys Institut for teknologi og undervisning.

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Forstår du engelsk? Klik her for at se flere diskussioner på Khan Academys engelske side.

Video udskrift

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