Odpowiedzi

2010-03-22T19:28:30+01:00
3x -2 -7x =4-2x
3x-7x+2x=4+2
-2x=6/(-2)
x=-3
2010-03-22T19:28:41+01:00
2010-03-22T19:30:05+01:00
3x -2 -7x =4-2x
-4x-2=4-2x /+4x
-2=4+2x /-4
-6=2x /:2
-3=x
x=-3