Răspuns:
a = 1
b = 3
c = 3
[tex]a+b = 3 \Rightarrow\boxed{ a = 3 -b}\\\\3-b+2b+3c=14 \Rightarrow b+3c = 14 -3 \Rightarrow b+3c = 11 \Rightarrow \boxed{b=11-3c}\\\\3*(11-3c)+4c=18 \Rightarrow 33-9c +4c = 18 \Rightarrow 33-5c = 18 \Rightarrow 33 = 18+5c \Rightarrow \\\\33-18 =5c \Rightarrow 5c=15 \Rightarrow c=15: 5\Rightarrow \boxed{c=3}\\\\b = 11- 3*3 \Rightarrow b = 11-9\Rightarrow \boxed{b = 2}\\\\a = 3-2\Rightarrow \boxed{a=1}[/tex]
