Odpowiedzi

2010-02-10T18:02:24+01:00
-4(2y +1) + y = 7y - 4
5y - 3 (y - 1)= 2y - 3
(12x - 4 ) : 4 +1 + y = 3x + y
-3 (x-7) - (x+2 ) = -4x - 23
-(x + 2) - 3 (2x - 4) + 2 (y - 1 ) = -7x + 2y - 16
1 1 1
2010-02-10T18:03:48+01:00
-4(2y+1)+y=-8y-4+y=-7y-4
5y - 3 (y - 1)= 5y-3y+3=2y+3
(12x - 4 ) : 4 +1 + y =3x-1+1+y=3x+y
-3 (x-7) - (x+2 ) =-3x+21-x-2=-4x+19
-(x + 2) - 3 (2x - 4) + 2 (y - 1 ) =-x-2-6x+12+2y-2=-7x+2y+8