Question

Problema 5 , va rog frumos, urgent!!!!

Answer 1

a =numarul initial de pasageri /=supra

50%din a coboara 1statie 50a/100=a/2

6 urca,25%coboara 3 statie

25/100(a-a/2+6)

1/4(2a/2-a/2+12/2)=1/4(a+12/2)=a+12/8 stim ca raman 21

a-a/2+6-a+2/8=21 inmultim cu 8

8a-4a+48-a-12=168

3a=168-36

a=132:3 a=44

initial au fost 44 pasageri