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x/3=y/7=z/11 x+2y+3z=200

Răspuns :

x/3=y/7=>x=3y/7
y/7=z/11=z=11y/7
3y/7+2y+33y/7=200
Aducem la acelasi numitor
3y+14y+33=1400
50y=1400
y=28
x=3*28/7=12
z=11*28/7=308/7=44