Question

6. Suma a trei nr.este 27.Daca din fiecare se scade acelasi nr.,se obtin nr.7,2,9,Care sunt numerele?

Answer 1

a+b+c=27. a=|---|+7|. b=|---|+2|. c=|---|+9|. 27-7-2-9=9. 9:3=3 (un segment). 3+7=10 (a). 3+2=5 (b). 3+9=12 (c). Verificare: 10+5+12=15+12=27.

Answer 2

a+b+c=27 a-x=7, a=7+x b-x=2, b=x+2 c-x=9, c=9+x a+b+c=27 7+x+x+2+9+x=27 3x+18=27 3x=27-18 3x=9 x=9:3 x=3 a=7+x=7+3=10, a=10 b=x+2=3+2=5, b=5 c=9+x=9+3=12, c=12