Odpowiedzi

2010-03-28T14:53:12+02:00
3x-11=-2
3x=-2+11
3x=8/3
x=8/3



(y + 4) × (-2) = 4
y=4-4+2
y=2


2010-03-28T15:57:18+02:00
3x - 11 = -2
3x=-2 + 11
3x=9 /:3
x=3
spr.
L = 3×3 - 11 = 9 - 11 = -2 P = -2 L=P

1 = 15 - 2y
2y = 15 - 1
2y = 14 / : 2
y = 7
spr.
L = 1 P = 15 - 14 = 1 L=P