Odpowiedzi

2010-03-10T18:18:47+01:00
2t-(3t+1)=2t-3t-1=-1t-1
-(4+x)=2(3-x)
-4-x=6-2x
-x+2x=6+4
x=10

3(y+6)-y=2(y+9)
3y+6-y=2y+18
3y-y-2y=18-6/ coś musi byc zle/

(x-7)-2(3x+5)=3
x-7-6x-10=3
x-6x=3+10+7
5x=20
x=4