Odpowiedzi

2010-04-02T12:30:21+02:00
12x+15x-4x-5=8x-4x+10x-5
23x-5=14x-5
23x-14x=5-5
9x=0
x=0
1 1 1
2010-04-02T12:30:45+02:00
(3x-1)(4x+5)=(4x+5)(2x-1)
12x+15x-4x-5=8x-4x+10x-5
12x+15x-4x-8x+4x-10x=-5+5
9x=0/:9
x=0
1 1 1