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B=2xA
C=3xA
D=A+B+C
A+B+C+D=3900

A,B,C,D=?​


Răspuns :

Răspuns:

D= 2A+3A+A

A+2A+3A+2A+3A+A=3900

12A=3900

A=325

B=2A=2×325=650

C=3A=3×325=975

D=A+2A+3A=325+650+975=1950