Răspuns :
Răspuns:
Explicație pas cu pas:
Metoda grafica
a l-----l-----l-----l-----l
b l-----l-----l } suma lor = 77
c l-----l
4 + 2 + 1 = 7 parti egale
77 : 7 = 11 ( c )
4 x 11 = 44 ( a )
44 : 2 = 22 ( b )
_____________
Verific: 44 + 22 + 11 = 77
a + b + c = 77
a = 4 × c
b = a : 2
b = 4 × c : 2
4 × c + 4 × c : 2 + c = 77
7 × c = 77
c = 77 : 7
c = 11
a = 4 × 11
a = 44
b = 44 : 2
b = 22
a = 4 × c
b = a : 2
b = 4 × c : 2
4 × c + 4 × c : 2 + c = 77
7 × c = 77
c = 77 : 7
c = 11
a = 4 × 11
a = 44
b = 44 : 2
b = 22