Odpowiedzi

2010-03-08T18:57:34+01:00
1. x+2x+y+2= 3x+y+2
2. y -(2y + 3y)= y-5y=(-4y)
2010-03-08T18:57:34+01:00
X+2x+y+2=3x+y+2
y-(2y+3y)=y-5y=-4y