Question

Stiind ca doua camioane si patru microbuze cantaresc impreuna 58 tone,iar 2 camioane si 9 microbuze cantaresc 93 tone,aflati cat costa un camion si cat costa un microbuz

Answer 1

2c+4m= 58 / • (-1)
2c+9m=93

-2c-4m=-58
2c+9m= 93
/ 5m= 35
m= 35 :5
m=7
2c+4•7=58
2c+28=58
2c=58-28
2c= 30
c=30:2
c=15


Rezolvare prin metoda reducerii ( sistem )