Răspuns:
[tex]a + a + a + a + b + c = 107 \\ 4a + 43 = 107 | - 43 \\ 4a = 64 | \div 4 \\ a = 16 \\ [/tex]
[tex]b + c = 43 \\ b - c = 27 = > b = 27 + c \\ 27 + c + c = 43 | - 27 \\ 2c = 16 | \div 2 \\ c = 8 \\ \\ = > b = 27 + c = 27 + 8 = 35 [/tex]
