Răspunsuri

2014-09-28T16:02:37+03:00
A) x+5y+z=x+3y+2y+z=2*14=28
B)3x+15y+3z=3x+9x+6x+3z=6*14=84
C)5x+11y-2z=5x+15y-4y-2z=5*14-2*14=3*14=42
D)5x+19y+2z=5x+15y+4y+2z=7*14=98
28 4 28