Claudialucan53id Claudialucan53id Matematică a fost răspuns a)x/2+y=13-x/2+y=4b)x/2+y/3=1/6x/6-y/4=1/2c)-x+y/3=0,(3)x/2-y=-25/18d)3(x+y-1)=2x-y+6,5-2x+9y=-24. UUrgentva rog!