Odpowiedzi

2009-11-15T13:53:09+01:00
16-5y+x+2x+3y-18 x=1/3 , y=-1/2
16-5y+x+2x+3y-18=3x-2y-2
3x-2y-2=3*1/3-2(-½)-2=1+1-2=0
2009-11-15T13:57:16+01:00
16-5y+x+2x+3y-18= 16-8y+3x-18

16-8 razy 1\2+3razy 1\3= 16-4+3-18=12+3-18=15-18=-3
2009-11-15T14:00:30+01:00
16-5y+x+2x+3y-18=-2-2y+3x

-2-2*(-1/2)+3*(1/3)=-2+1+1= 0