Răspunsuri

2014-10-09T23:36:04+03:00


x+y=8   ]·2               2x+2y=16    (1)

y+2z=35   ]·5         5y+10z=175   (2)            (2) - (1)   ⇒  

3y-2x+10z =159

2 3 2