Răspuns :
Radu - x
Marius - 4x
Irina - x+30
Avem ecuatia
x+4x+x+30=750
6x+30=750
6x=720
x=120 (Radu)
4x=480(Marius)
x+30=150(Irina)
Marius - 4x
Irina - x+30
Avem ecuatia
x+4x+x+30=750
6x+30=750
6x=720
x=120 (Radu)
4x=480(Marius)
x+30=150(Irina)
I. I____I30I
R. I____I
M. I____I____I____I____I
Sunt 750 de timbre in total .
750-30=720 suma partilor egale
720:6=120 ( Radu )
120+30=150 ( Irina )
120x4=480 ( Marius )
Verificare : 480+150+120=750
R. I____I
M. I____I____I____I____I
Sunt 750 de timbre in total .
750-30=720 suma partilor egale
720:6=120 ( Radu )
120+30=150 ( Irina )
120x4=480 ( Marius )
Verificare : 480+150+120=750