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Ligningssystemer: TV og DVD

Vi løser en tekstopgave med vægten af fjernsyn og DVD'er ved at opstille to ligninger med to ubekendte og efterfølgende løse dem. 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.

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