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Ligningssystemer med substitutionsmetoden: 2y = x + 7 og x = y - 4

Når du løser et ligningssystem med substitutionsmetoden, kan du isolere en variabel og erstatte den med et udtryk fra den anden ligning. Dermed kan du løse for én variabel, som du derefter kan bruge til at løse for den anden. Lavet af Sal Khan og Montereys Institut for teknologi og undervisning.

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