Odpowiedzi

2009-10-20T16:22:58+02:00
2009-10-20T16:23:55+02:00
2009-10-20T16:25:35+02:00
2(x-1)+4=2(x+2)

2-2(x-1)+4=2x

2-2(-1)+4=1x

(-1) + 4 = -3

x=-3
2 5 2