Question

5 autoturisme si 8 camioane consuma 81 l de benzina la 100 km parcursi , iar 8 autoturisme si 4 camioane consuma 68 l de benzina la 100 km .Citi l de benzinav consuma unautoturism la100 km ? dar un camion?

Answer 1

$\left \{ {{5a+8c=81} \atop {8a+4c=68}} \right. \\ \left \{ {{5a+8c=81} \atop {16a+8c=136}} \right. \\ \left \{ {{11a=55} \atop {8a+4c=68}} \right. \\ \left \{ {{a=5} \atop {c=7}} \right.$
deci un autoturism consuma 5 l ,iar un camion 7 l