6 randuri*30=180locuri
180*4,5lei=810lei(6 randuri)
5130-810=4320lei(restul randurilor)
4320:6=720locuri
720locuri:30=24 randuri
24+6= 30randuri in total
30 randuri*30loc=900locuri
720*6lei=4320lei(6 lei/bilet)
180*4,5lei=810lei(4,5lei/bilet)
In total sunt 30 randuri a 30 locuri=5130lei
1)23x1+11=34
23x2+11=57
23x3+11=80
Numerele sunt 34,57 si 80
proba: 34:23=1 rest 11
57:23=2 rest 11
80:23=3 rest 11