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Rezolvati ecuatiile:
1+2+3+...+100+x=5050
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Răspuns :

1+2+3+...+100+x=5050 => (100x101):2+x=5050 => 50x101+x=5050 => 5050+x=5050 => x=5050-5050 => x=0
Halloween12
(1+100)×100:2+x=5050
101×50+x=5050
5050+x=5050
x=0