tricou = t
bluze = b
6t+7b = 523
6t+10b=652
2b+5t=?
\left \{ {{6t+10b=652} \atop {6t+7b = 523}} \right. => 3b = 652-523=129 => b=43
6t+7b=523 => 6t+7*43=523 => 6t=523-301 => 6t=222 => t=222/6 => t=37
2b+5t=?
2*43 + 5*37 = 86 + 185 = 271 lei costa 2 bluze si 5 tricouri !
Coroana + Brainly Answer ? :)