Question

помогите пожалуйста!!!!​

Answer 1

$\left \{ {{xy=12} \atop {\frac{1}{x}+\frac{1}{y}=1\frac{1}{12}}} \right.\\\\\left \{ {{xy=12} \atop {\frac{x+y}{xy}=\frac{13}{12}}} \right.\\\\\left \{ {{xy=12} \atop {\frac{x+y}{12}=\frac{13}{12}}} \right.\\\\\left \{ {{xy=12} \atop {x+y=13}} \right.\\\\\left[\begin{array}{ccc}\left \{ {{x_{1} =1} \atop {y_{1}=12 }} \right. \\\left \{ {{x_{2}=12 } \atop {y_{2} =1}} \right. \\\end{array}\right\\\\Otvet:\boxed{(1;12),(12;1)}$