Questão 8) Lucas comprou 3 canetas e 2 lápis pagando RS 7,20. Danilo comprou 2 canetas e 1 ápis pagando \operatorname{R} \ 4,40 .Osistemadeequac\co~esdo 1^{\circ} grauquemelhorrepresentaasituac\ca~oeˊ: \left{\begin{array}{l}3 x+2 y=7,20 \ 2 x+y=4,40\end{array}\right. b) \left{\begin{array}{l}3 x+y=7,20 \ x+y=4,40\end{array}\right. c) \left{\begin{array}{l}x+y=3,60 \ x-y=2,20\end{array}\right. d) \left{\begin{array}{l}3 x-2 y=7,20 \ 2 x-y=4,40\end{array}\right. $