Odpowiedzi

2010-03-03T23:04:17+01:00
2-(x+3y)=2-x-3y
-(-2x+3y)-(-3x+2y)=2x-3y+3x-2y=5x-5y
2(3x+y)+(3-2y)=6+2y+3-2y=9
(-2X+1)-(3+2x)=-2x+1-3-2x=-2
-(2x-4)-(2-4x) = -2x+4-2+4x=2+2x
2010-03-03T23:05:39+01:00
2-(x+3y)=2-x-3y
-(-2x+3y)-(-3x+2y)=2x-3y+3x-2y=5x
2(3x+y)+(3-2y)=6x+2y+3-2y=6x+3
(-2X+1)-(3+2x)=-2x+1-3-2x=-2
-(2x-4)-(2-4x) =-2x+4-2+4x=2x+2