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a+b+c+d=2999,a+b+c>cu50decatb+c+d,d este cel mai mic nr natural de 4 cifre .afla b+c

Răspuns :

d=1000 prima operatie 2999-1000=1999(A+b+c), a doua operatie 1999-50=1949(b+c+d) 1949-1000=949(b+c)
a+b+c+d=2999______________________a+b+c=b+c+d+50.=>a+b+c-b-c-d=50=> _a-d=50=>a=50+d.Pb ne spune ca d e cel mai mic nr de 4 cifre => d=1000.____ _=>a=50+d=50+1000=1050.__________ _Inlocuim in:a+b+c+d=2999=>________ _=>1050+b+c+1000=2999=>_________ _=>b+c+2050=2999=>b+c=2999-2050=949