UNUINEA EUROPEANĂ C 13 10. Daca a = 11 si b + c = 8, calculati: a. 2.a +3.b +3.c= ab+a.c-34 = 11. Daca a+b+c= 7, aflati: 5.a +5.b+5.c= 6 a +6.b + 6.c + 100 = 12. Calculati numarul x, stiind ca a - b = 6 si: x+3.a = 3.b = 20 a. x-a-x.b +9a-9b = 654 144 b. d. a-b+a-c+25 = 11-b+11-c-6-a= b. a 13+ b 13+c-13+894 = b. 7-a+7.b+x=55 d. 13+x-(5.a-5
