Odpowiedzi

2009-04-19T15:41:01+02:00
Ob1 = 2x + 2(x+6)
ob2 = 80%2x + 125% 2(x+6)

2x + 2(x+6) = 80%2x + 125% 2(x+6)

2x + 2x + 12 = 80/100 2x + 125/100 2x + 6

4x + 12 = 160/100 x + 250/100 + 6

4 x + 12 = 4,1 x + 6
- 0,1 x = - 6 | x (-10)
x = 60

ob1 = 120 + 2 x 66 = 120 + 132 = 252
Ob2 = 0.8 x 2 x 60 + 1,25 x 2 x 66 = 96 + 165 = 261