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Raisuca3
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Rezolvati:x-280+213+319-109=1000 si b+1200-580=2011

Răspuns :

x-280+213+319-109=1000
x-280+319-109=1000-213=787
x-280-109=787-319=468
x-280=468+109=577
x=280+577
x=857

b+1200-580=2011
b+1200=2011+580=2591
b=2591-1200
b=1391

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