Odpowiedzi

2010-04-08T19:43:36+02:00
A)S=(a+2t)/3 |razy 3
S3=a+2t |-a
S3-a=2t |:2
t=3S-a
b)a=(4k-l)/(m +2) |razy (m+2)
a(m+2)= 4k-l |+l
l+am+2a=4k |-(am+2a)
l=4k-am+2a