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a)Daca a+b-=15 si c= 3 calculati ac+bc
b) daca a-b=27si c= 30 calculati ca- cb
c) daca xy+ xz = 126 si x = 5 calculati y-z
d) daca xy-xz=652 si x= 5 calculati y-z
Va rogg frumoss !!! dau coroana plzz am nevoie de exercitiu