Odpowiedzi

2010-04-12T19:36:34+02:00
4(x+3)=5x-19
4x+12=5x-19
4x-5x=-12-19
-x=-31/(-1)
x=31
2010-04-12T19:36:36+02:00
4(x+3)=5x-19
4x+12=5x-19
4x-5x=-19-12
-x=-31|-
x=31
2010-04-12T19:36:58+02:00
4x+12=5X-19
4x-5x=-19-12
1x=-31/:1
x=-31