Odpowiedzi

2010-02-01T17:13:15+01:00
-9z-7=-z-6
-9z+z=-6+7
-8z=1 /:-8
z=-⅛

spr -8*(-⅛)=1
2010-02-01T17:16:15+01:00
-9z-7 = -z-6
-9z+z=-6+7
-8z=1/:(-8)
z= - 1/8

spr :

-9 * (-1/8) -7 = 1/8 -6
9/8 - 7 = -5 i 7/8
1 i 1/8 - 7 = -5 i 7/8
-5 i 7/8 = -5 i 7/8