Odpowiedzi

2010-04-14T22:12:51+02:00
6y -(4x+7Y) :2 + (12y+6x)=6y-2x-3.5y+12y+6x=14.5y+4x
4(z+5)=4z+20
7(x-4)=7x-21
5(4y-2)= 20y-10
2010-04-14T22:13:54+02:00
2) 4z+20=24z
3) 7x-28=-21x
4) 20y-10=10y