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Andyandrey2000
a fost răspuns

Dan si Corina au impreuna 112 timbre. Corina are de 3 ori mai multe decat Dan.Cate timbre are fiecare?

Răspuns :

D+C=112
C=3D
D+3D=112
4D=112
D=112:4=28 timbre are Dan
C=3x28=84 timbre are Corina
Sebilică
Notam Dan=D
Notam Corina=C
C+D=112 timbre
C=3D
Inlocuim C cu 3D
3D+D=112 timbre
4D=112 timbre
D=28 timbre
C=3D
C=3 x 28 timbre
C=74 timbre
Dan are 28
Corina are 74

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