Odpowiedzi

2010-03-14T14:26:11+01:00
D=ab/(a+c)
da+dc = ab
dc = ab - ad
dc=a(b-d)
a=dc/(b-d)
5 3 5
2010-03-14T14:27:54+01:00
D = ab : (a+c) / * (a+c)
d(a+c) = ab / : d
a+c = ad : d
a = ab : d - c / * d
ad = ab - c
ad - ab = - c
a(d-b) = -c / : (d-b)
a = -c : (d-b)
4 1 4